Postgresql copy data from one table to another database

Then load the data into the new database like this: python manage. or you can use this: Oct 14, 2020 · I want to copy the entire data (only data, not schema) from one database to another in Postgres, given that both the databases have a similar schema except the varchar length. So, what it the fastest way to do that? I'm new to talend, i know that is possible to do something like that: toracleinput->map->toracleoutput. In other words, I don't want to have to go in and manually drop table attendees cascade before running the restore. edited Mar 13, 2013 at 15:53. Create a function to copy old schema data to new schema: Sample Execution: Database Research & Development: Shared one PostgreSQL function source code to copy whole schema table with data into another schema. Feb 5, 2018 · 1. CREATE SERVER mydb. (you don't have to specify UTF8 encoding, but I always do) Aug 3, 2009 · I usually do this: pg_dump dbname -s -t table_to_clone > /tmp/temp. COPY is one of the most efficient ways to load data into the database (and to modify it, with some SQL creativity). item_type. In one case I need to get some results that depends on deleting X, in another case, I'll need to delete Y. i tried INSERT INTO db1. Then in PostgreSQL, if you need to share tables between levels, use only one db (do not create multiples databases, use only postgres), and use multiples schemas like Oracle: postgres. table_schema = 'public Mar 8, 2017 · Tour Start here for a quick overview of the site Help Center Detailed answers to any questions you might have Oct 30, 2020 · Say we have 2 databases in postgresql: Database A(with dblink extension installed) and Database B (without dblink extension) Copying table from B to A looks fairly straightforward: select * into Dec 26, 2021 · 1. >table in Sybase or schema. I mean your remote server don't update/insert/delete any data on "manifest_status" table. I have the table Orders with about 30 rows. Once this is done, a list will appear showing your databases: Double-click a database in order to open a psql command line interface. One way is to create a function for that: returns public. Than sed or vim of the file to change the table name and related stuff. execute('SELECT * from "table1"') I'm trying to do something like. In the case of PostgreSQL, the restore operation can be done with pg_dump or psql: there is a way to choose in the Restore dialog. Table A has 10 records and Table B 5 records. Copying a database table (or duplicating it, for that matter) is one of those basic operations that can be performed for a variety of reasons. #. the two tables have almost the same structure, but are in different databases. I also copied all data from the original table to its clone. copy() method, passing it a query of the form COPY On the PostGIS 2. Also there's an equivalent of phpMyAdmin for Postgres, called "phppgadmin". table_1_part_2. csv' CSV HEADER. The server based COPY command has limited file access and user permissions, and isn’t available for use on Azure Database for PostgreSQL. You could dump the database using pg_dump and then restore it on the new server using psql. cursor C_BRIC_EXTRACT. then on local machine psql -h db1_original: create table tt as select * from datastore where false; \copy tt from '/tmp/d. AS. I'm using pgAdmin4 tool on PostgreSQL. You can specify command line arguments to both pg_dump and psql to specify the Oct 6, 2016 · This will loop through all tables in the old schema and recreate them with data (no constraints, indexes, etc) in the new schema. I was going to create a temporary table, copy the data in, recreate the indexes and the delete the rows I need. This article may help the beginner of PostgreSQL, because moving or copying data within the database which is the ubiquitous task. I'm copying tables using. 0 I have a table "lakes" with MULTIPOLYGON geometry column. -- Set the search path to the target schema SET search_path = newSchema; -- Loop over the table names and recreate the tables DO $$ DECLARE table_name text; BEGIN FOR table_name IN SELECT t. sql This will create a SQL dump of the selected schema. In database A, table records has 3 columns person_id, shop_freq and time, and has about 1000 rows. billing_record_invoiced_code; BEGIN. And this actually works. maybe do the restore on faster hardware, do a vacuum full on the database and then do a file copy to the EC2, eg: using rsync. I need to copy the data from a view in the remote database server and put it in a new table in my local database server As Jul 21, 2017 · Use PostgreSQL pg_dump utility with -t table option to define tables that should be dumped and restore them in a another database. Next create a task with "Full load, ongoing replication" settings. if oid in firstapp_offer_Vendor is equal to firstapp_bid. 04) and the identical version of PostgreSQL (9. Mar 7, 2017 · I would like to copy rows of data from one table to another table in the same database using pgadmin. Step 2: Copy the dump file to the remote server. Here is a tested-and-working solution in Python. tables t WHERE t. However, this pg_dump only works on either non-partitioned table or a partition itself. Both have tables with same name in their public schema. Download DBCopier Jun 16, 2019 · According to the documentation:. Mar 1, 2014 · 2. Open a source PostgreSQL table. item_type is a custom type, the PostgreSQL doesn't have knowledge of how it should convert it to a different custom type public. routines WHERE routine_type='FUNCTION' AND specific_schema='public'; And I also can get the function code details using Jun 12, 2019 · Thanks for contributing an answer to Stack Overflow! Please be sure to answer the question. id, f. Jan 10, 2012 · How I can copy my public schema into the same database with full table structure, data, functions, fk, pk and etc. By using the COPY command, you can avoid the need for distributed processing tools, adding more CPU and RAM to the database, or using a NoSQL database. public. Dec 17, 2021 · This thread here shows how to copy a table from one database to another, where a similar table already exists: pg_dump -a -t my_table my_db | psql target_db. I can't delete data from the original table, because this original table is the source of data. this will create a file called "filename" at the directory where you ran above command - that will have schema and data for the Mar 14, 2023 · I just created a new database. Here's a couple of commands from the above link: Create the backup: Copy to the new server (specific command depends on OS) Go to the new server. Open the Postgres app: In order to start the server, click the start button. I want to copy this entire table to an empty one with the same structure called Orders2. May 27, 2016 · You can put in the other 5 tables as UNION: CREATE TABLE new_table AS SELECT * FROM ab1_2 UNION SELECT * FROM ab3 UNION SELECT * FROM ab4 UNION SELECT * FROM ab5 UNION SELECT * FROM ab6; In the second one only the field names are needed. Apr 15, 2015 · EXECUTE FORMAT('INSERT INTO %I SELECT * FROM %I;', dest, src); END IF; END. I would also like to do this for a specific subset of tables within the schema, and want the new schema to have a different name in the other database. 2 is not supported anymore). Because test. Create the new database, give the rights and exit: CREATE DATABASE new_database_name; GRANT ALL PRIVILEGES ON DATABASE new_database_name TO my_user; \d. Nov 17, 2020 · In case it is not an option, you should definitely take a look a postgres_fdw (Foreign Data Wrapper), which allows you to access data from different databases - even from different machines. csv'; Again, the two tables on the two different database instances must have the same structure. The source file does not have to exist on the same machine as the Sep 18, 2020 · If that is the case, then join the two tables when you need to bring the data together: select f. CREATE TABLE new_table AS SELECT * FROM existing_table WHERE condition; The condition in the WHERE clause of the query defines which rows of the existing table will be copied to the new table. exact commands -. Very late answer, but I think my answer is more straight forward for specific use cases where users want to simply insert (copy) data from table A into table B: INSERT INTO table_b (col1, col2, col3, col4, col5, col6) SELECT col1, 'str_val', int_val, col4, col5, col6. I have many partitions in the two databases: table_1_part_1. Nov 23, 2021 · Here are the steps to copy/transfer data from one database to another in PostgreSQL. Often is enough to replace table_to_clone with table_new_name. I would like to copy Table A data to Table B but only copy the new entries (5 records) and ignore the duplicates/already existing data. FROM table_a. (SELECT * FROM pets); Here, I copied a table called pets and named the new table pets2. I can't use the template copy method because it overwrites the schema as well. Nov 6, 2011 · To also quickly copy the table schema, create the needed table(s) locally with: CREATE table tbl1 AS SELECT * FROM view1 LIMIT 0; -- no data, just the schema. Export via pg_dump into a file: pg_dump --host "source hostname" --port 5432 --username "username" --no-password --verbose --file "filename" --table "source schema. 4 P. Feb 8, 2017 · Create a below function and execute to migrate your schema. So, I don't wish to use "Create Table" approach Nov 19, 2020 · DataGrip allows to export/import tables DataGrip advisor says: To configure: open 'PostgreSQL 10 - postgres@localhost' data source properties, go to 'Advanced' tab and add '-XmxNNNm'to 'VM options' field, where NNN is the number of megabytes (e. Go to PostgreSQL command line: psql. exe --host=localhost --dbname=mydb --username=postgres -f . Dec 10, 2019 · REPLACE(`C`. Copy is supported using the Cursor. I want to bring existing Tables from old Database to the new one for database clean up purpose. Copy data between PostgreSQL. I need to just add the data to the existing table) The column names differ. You can copy data between tables in postgreSQL by using: INSERT INTO [Tablename]([columns]) SELECT [Columns] FROM [Table to copy form]; Which in your case would look like: INSERT INTO table2(a,b,c,d) SELECT a,b,c,d FROM table1; You can also easily create an empty table with the same table structure so that copying to it is easy, by using the Feb 10, 2013 · Here is a simple version of what I use to copy data between dbs: First, create a FOREIGN SERVER. Feb 1, 2022 · I am working on Google Cloud App Engine Platform. 2. com Copying Data Between Tables. What I did was to run: INSERT INTO history SELECT * FROM daily COPY t2 FROM '/home/export. Dec 28, 2022 · I have a remote postgresql server running with views in one of the schema. (SELECT * FROM pets) WITH NO DATA; May 27, 2019 · I have data in two tables. Is there a way to write a script to match them and do a copy? Please help. 4 (had to compile it myself) because the data is from an old 7. tablename" "source db name". Is there a way to copy table of one database to table of another database within the same cluster? I have a cluster with multiple database. language sql. I am just migrating the data; please create a blank table at your destination/second database server. This would leave us to resort to using JOIN. 0 database on the first server to a PostGIS 1. Jun 6, 2014 · I am new to Postgres and just discovered that I cannot access data of different databases in one SQL query. table in Oracle. Jan 5, 2023 · CREATE TABLE pets2 AS. table May 16, 2011 · PostgreSQL copy/transfer data from one database to another. On a macOS this can be done when you start the server. You open a connection to the "old" database, another one to the new database, you SELECT in one and INSERT in the other. json. To dump the objects, use the Dump with… context menu option. At creation, I usually prefix with table name indexes and triggers, so at this point I have nothing more to do. g. This is a utility script. <defaultuser. `Name`, 'C', '') AS C, 'dummy' AS `tkey`. MyTable. If yes can anyone please share the functions. fourth_column from first_table f join second_table s on s. And i want to do it in a fast way. How can I do this? Thank you. table2( id, name, adress, lat, lng ) SELECT id, name, adress, lat lng FROM db2. I had the same issue (with ASP. It is slightly more complex than the traditional export/import approach, but it creates a direct connection to the foreign table. Step 3: Create a new database in the remote server where you want to restore the database dump: Feb 24, 2019 · I have two databases A and B each having a table called records. INSERT INTO db1. OPTIONS (hostaddr '111. create a new database user with the name new_user: CREATE USER new_user. user. However, in this case I'd rather carefully check if the data in Use the INSERT INTO command with a grouped set of data to insert new values. If we don’t want to insert the data, we can use the WITH NO DATA clause: CREATE TABLE pets2 AS. The other one is calculated on daily basis and I want to copy all of its records into the history one. first_column, f. Provide details and share your research! But avoid …. To copy a table with partial data from an existing table. \sensordata2. Pick the directory for the output file and suggest a filename. The reference schema and all the objects within are owned by a user called ref_user. db1 and db2. However, there is no merge operation in SQL, so we cannot use that approach. You can use this script for schema migration. PostgreSQL copy database within the same server: If a situation arises where one needs to copy a PostgreSQL database within a database server for testing purposes. Asking for help, clarification, or responding to other answers. I will change one table in master and i want to copy to remaining database. You must provide instructions for the PostgreSQL how to convert from one type to another. Lets call that one history. While in database B, table records has 4 columns person_id, shop_freq, start_time and end_time, and is empty. result = cursor1. If you want different values to be used for different rows of C, you'll have to join the 3 tables (using JOIN - ON and WHERE) May 24, 2017 · I have another server with the identical OS (Ubuntu 16. My task is to copy my table from the PostGIS 2. Can we move or copy existing table functions to another database schema? I can get all the functions from a database schema using command below (Taken from here ): SELECT routine_name FROM information_schema. My version of Postgres is 8. MyTable (Col1, Col2, Col3) SELECT Col1, COl2, Col3 FROM db2. FOREIGN DATA WRAPPER postgresql. And also learned the concept of schema in Postgres. Click the "Data/Objects" tab, check "Only data" or "only Schema" . 111. The secret is to use only 2 level, db. first_column = 200 and s. Right CLick on the Db1 >Backup. Mar 28, 2013 · It's Postgresql 7. How do I copy the raw database files to the new server? I don't care if read errors corrupt parts of the database, as I have ways of identifying and fixes those issues, but I need the data copied over before I can fix it. May 3, 2018 · I am currently working on moving data from one database to another in PostgreSQL. Also, try listing out all your fields. Using COPY TO and COPY FROM. I was trying several values of VM options (256, 1024, 8048) and also tuned my Postgres Sep 11, 2013 · 2. Or you could select "COMPRESS" format in the "backup" dialogue, and then you could use the restore dialogue. COPY moves data between PostgreSQL tables and standard file-system files. PostgreSQL makes it simple to do so using the CREATE DATABAS Aug 21, 2010 · I need to delete some data from it. backup -v -t sensordata2 Dec 1, 2016 · SQL Server - Copy data from one database to another - identical tables, new identity values needed 2 Aggregating results of two database views in one database view Jun 24, 2019 · Is it the only way because my table might have more than 25 columns and I don't wish to type in column names every time I wish to copy. CONTEXT: COPY attendees, line 1. I'm trying to do this using just pg_dump/pg_restore with no editing of the server db between running the two commands. Use the COPY (or \copy) command to insert values from a system file. 4 setup. I am studying python with psycopg2 to connect and run SQL queries in one database. I can't access the first database through remote connection, and therefore I can only export the table by exporting it to a . sql database_name. 0. Now its time to restore the CSV file to the second database. Dec 1, 2017 · In this post, I am sharing a demonstration on how to copy data from one table to another table using INSERT INTO SELECT in PostgreSQL. The entries table has a primary key of (username, date, time, x0, x1, x2). e. I have a master Database and multiple slave databases . In PC2: Right Click on Database> Create> Assign Filename "Db1" (same name as in PC1) Right Click Db1> Restore>select the copied file (if file is not getting displayed, click show all files) Done!! May 26, 2022 · I tried the following function for copying one table records from one schema table to another schema table. Copy into pre-existing table: INSERT INTO [Table to copy To] COPY moves data between PostgreSQL tables and standard file-system files. Jan 5, 2009 · But doing it in your favorite language is quite simple. 6). Identity Insert can also only be enabled for 1 table at a time in a database, so you must remember to enable it for the table, then disable it immediately after you are done importing. 7. So I need to specify exactly which columns to copy, and what their names are in the new table. Nov 15, 2017 · The simplest solution to copy data from one database to another is to save to a local file and then restore it. My (first) problem is that I cannot dump the table data. Jul 22, 2015 · First case: There are no activity on your remote server. Copy into a new pre-structured table: CREATE TABLE [Table to copy To] AS [Table to copy From] WITH NO DATA; - Note: “WITH NO DATA” specifies that the new table should only copy the table structure with no data. 5. Or write 5 SQLs in the form: INSERT INTO new_table SELECT * FROM other_table; Oct 24, 2017 · You can pipe the output from your pg_dump directly into pg_restore to save overhead of writing the backup to disk and reading it back later, which might make a big difference if you are limited on iops or you could use a foreign data wrapper to copy data from one db to the other (not sure if 9. fourth_column = 110 Jul 15, 2022 · 2. Feb 10, 2022 · I am trying to "dump" a table to a file, copy that file to a different host and restore the table on a database. I have to copy the data from one database of one instance to another database of another instance: My databases are both Postgres 13. 2 supports this, documentation is not online as 9. REPLACE(`C`. Select a destination PostgreSQL table and config fields. As of now, I have 2 cursors for each database. `Name`, 'C', '') AS C. S. Now, I want to create a new schema in db1 with name : new_schema Copy data from one PostgreSQL table to another PostgreSQL table. Net Core) and I realized my logging was slowing it down tremendously. May 11, 2016 · I'm writing the code in Python and am using the psycopg2 library to deal with my PostgreSQL database. Is there a way to do it via postgresql console? I use the following from Jan 29, 2021 · I want to copy column User_id from public. Dec 6, 2012 · The reason I did this is to cast the values from latvarchar to double and save them in latdouble without having to create a temporary copy of the whole of Table2 as it is a very large table with a few indexes. table_name FROM information_schema. \COPY runs COPY internally, but with expanded permissions and file access. If you really have two distinct PostgreSQL databases, the common way of transferring data from one to another would be to export your tables (with pg_dump -t ) to a file, and import them into Jan 11, 2015 · First, sudo as the database user: sudo su postgres. The above command selects the data that you want and then writes it to a CSV file using the \copy command. This will depending on your objective. 111',port '5432',dbname 'mydb'); FOREIGN DATA WRAPPER postgresql was pre-installed in my case. select pend_date, pend_note, record_id, suspense_cd, suspense_date from DEV_SWIMLANE2. Here is its syntax. We will look at two ways to do this – using dblink and using copy table statement. Now, I have two databases. rename the schema ref_schema to new_schema: Dec 23, 2021 · I am trying to copy a PostgreSQL schema and it's data from one database to another without impacting the availability of the current schema (old_schema). table syntax. I want to update a record with a specific ID in B with their data from A for all columns of A. then show the wizard. Feb 26, 2015 · I need to copy a lot af tables from one db to another. without any joining condition) and then choosing an arbitrary row (LIMIT 1 without ORDER BY). Sep 14, 2020 · Both versions of COPY move data from a file to a Postgres table. Oct 2, 2023 · The COPY command in PostgreSQL is a powerful tool for performing bulk inserts and data migrations. Give a Filename and Save. I have two tables I'm working with: mytesttable, which contains test entries and entries, which is my main entries. PostgreSQL: How to copy data from one database table to another database. Using dblink. dump the reference schema with pg_dump: pg_dump -n ref_schema -f dump. No use to give them an alias. -Xmx256m). So I have the follow What worked for me was to rename my 'default' sqlite database to 'sqlite', add my postgresql database connection as 'default', do the data export like this: python manage. Sep 21, 2023 · 1. I would like to copy data from Table A to Table B where Table B will have 10 records (5 old records + 5 new records from Table A) Nov 14, 2018 · 2. Jun 20, 2017 · DETAIL: Key (id)=(237) already exists. Here are my two tables: Table firstapp_bid: Sep 4, 2017 · you can use copy for that (in psql -h db2_restored on local machine): \copy datastore to '/tmp/d. Psycopg allows to operate with PostgreSQL COPY protocol. Is it possible to copy data of one table to another table using functions. "firstapp_offer_Vendor" to table firstapp_bid on the basis of oid, i. $$. 3. Then create function that opens a connection, removes old data These are the steps: Open pgAdmin, right click the database table you want to move, select "Backup". But it will take a lot of time to do it for 40 tables. WARNING: errors ignored on restore: 1. But I need to transfer ONLY DATA from one server to another. id = f. The idea is to truncate the dest table and load it with data from the src table, if the src table (staging table) has more rows than the dest table (actual production table). second_column, f. sql. Using the command line tools : pg_dump and psql , you could do even in this way : pg_dump -U postgres -t t1 db1 | psql -U postgres -d db2. Mar 2, 2017 · In this post, I am sharing a Linux shell script to copy your table data from one PostgreSQL Server to another PostgreSQL Server using psql command line. Nov 9, 2023 · How to copy a table from one PostgreSQL database to another? Here is an example bash script that copies a table from one PostgreSQL database to another: # Check the table exists in the Source DB Jun 24, 2015 · I'm trying to insert data from one PostgreSQL table to another while removing duplicate entries but I'm having some trouble with the code. In 2022 the simplest way to achieve this task is using AWS Database Migration Services (AWS DMS). Yes, backup using "PLAIN" format (SQL statements) and then (when connected to the other DB) open the file and run it. user2148736. Copy the saved file from the PC to another PC. is. 5 on the second server. My problem is how can I pull and insert the data that I queried from one database to another. Use INSERT INTO SELECT statement, for this exercise: Create two sample tables: 1. Set Format to "Plain". #!/usr/bin/python """ Copy a *part* of a database to another one. After some digging I have only been able to find this: pg_dump -t tablename dbname | psql otherdbname Mar 13, 2023 · In this article, we will discuss the process of copying a PostgreSQL database on the same server or from a server to another. Let's have an overview of the most common situations in which you need to copy PostgreSQL tables—and the methods of copying them. I noticed the following command: pg_dump -C -h localhost -U localuser dbname | psql -h remotehost -U remoteuser dbname. You'd miss the concurrently added row with NULL amount in this case (data loss due to concurrency; think ACID). Aug 1, 2011 · 10. For more information see PostgreSQL pg_dump documentation page. Apr 7, 2016 · I need to copy data from one table to another. Second case: That table was updated/inserted/deleted. COPY TO can also copy the results of a SELECT query. But I do not want to copy anything else other than data. py dumpdata --database sqlite --natural-foreign --natural-primary > sqlite-dump. answered Mar 13, 2013 at 13:44. In DataGrip there are dump/restore tools for PostgreSQL. Select the table in question and then Jan 31, 2019 · as the title said. insert into datastore. Jun 5, 2020 · This way you have all the rows written to this file. It allows you to quickly and efficiently insert large amounts of data into a table. Description. sql file. But a missing primary key will probably bite you later on, anyway. COPY naming a file or command is only allowed to database superusers or users who are granted one of the default roles pg_read_server_files, pg_write_server_files, or pg_execute_server_program, since it allows reading or writing any file or running a program that the server has privileges to access. I have tried the following( to copy existing data in STUD table into STUDENT table): Feb 22, 2021 · To do so the following commands need to be followed: Step 1: Create a Dump file of the source database. How to duplicate a table in PostgreSQL. Preview data. I need to copy schema NOT database Oct 15, 2012 · 16. Jun 2, 2016 · Both tables already exist (ie: I must not drop the 'copy-to' table first. dblink allows you to easily fetch data from another database local or remote. third_column, s. I have two tables: A [ID, column1, column2, column3] B [ID, column1, column2, column3, column4] A will always be subset of B (meaning all columns of A are also in B). csv'. I use this command: pg_dump. I am looking for a short cut than doing it manually. Thank you. You can create a migration task, and set the original database as the source endpoint, and the new database as a destination endpoint. 4. schemaX. Then you can load it to another database also using copy: \COPY country FROM 'country_data'; Then you can delete the data with: DELETE FROM country WHERE country_name LIKE 'A%'; You could also make copy and delete in one query. Instance a: database a_a; Instance b: database b_b; I have to copy "a_a"'s data into b_b; I just want to copy the data without copying the entire database structure. . However, they have slightly different column id. Jun 15, 2021 · pg_dump -h host_address -U username -s schema_name -Fc database_name > dump_file_path. I see that there are solutions for copying tables from one Postgres SQL server to another. CREATE OR REPLACE PROCEDURE ARCHIVE_DATA. offer_id then user_id should be copied to vendor_id. table2; See full list on postgresqltutorial. Oct 17, 2017 · A PostgreSQL database can have many schemas, each one with its tables and views, and you can copy from one schema to another with the schema. Since this is a simple merge which no key matching is needed, we can simply add a dummy key to the table. Please note that table already exists in cdm schema. One contains hundreds of millions of records. Restore tools for MySQL and PostgreSQL also can be accessed from the context menu. id where f. Most of the posts I found here talk about database from local server to a remote server . Then you can use PSQL or DBeaver to import and create the schema in your server B or database B. It then uses the values from that arbitrary row to update all rows of table C. 1. Copy structure and data from the old database to the new one: I have two database tables. If so, you can delete that table on your remote server and then copy from local to your server. \COPY users TO 'users. py loaddata sqlite-dump Feb 6, 2014 · Your derived table is cross joining A and B (i. Choose source/target PostgreSQL database and logon. Jan 5, 2022 · So I have a table, person_table: name age gender john 21 M abraham 32 M I want to copy name and gender columns of this table from one database to another on another server. Please don't forget backup that tablet. Use the INSERT INTO command in conjunction with a SELECT statement to insert existing values from another table. Click “Convert From Table” at task dialog. Dec 9, 2019 · The first step to copying a database is to open psql (the postgreSQL command line). I tried the following stored procedure for copying one table records from one schema table to another schema table. COPY TO copies the contents of a table to a file, while COPY FROM copies data from a file to a table (appending the data to whatever is in the table already). Then copy the (reverse engineered) DDL instructions and create all tables in the target db. Further, you can modify the script for generic use something like May 5, 2015 · In PC1: Run PgAdmin. May 19, 2017 · For example another Transaction adding rows with NULL amount AFTER you have calculated the data to be INSERTed using SELECT and before you DELETE all NULL amounts. CREATE DATABASE [Database to create] WITH TEMPLATE [Database to copy] OWNER [Your username]; I don't want to use pg_dump because I want to be able to update the tables in the second database as changes are made to the first and pg_dump won't run if data in the table already exists. pg_dump -U postgres -d source_database -f source_database. Jul 9, 2019 · 3. ne xz tc zr ty jt fs xd rc hk