https://quicktasks.ismael.casimpan.com/tags/guide/Recent content in guide on IT QuicktasksHugo -- gohugo.ioCopyright © 2018–2022, Ismael Casimpan Jr.; All Rights ReservedMon, 06 Sep 2021 09:28:45 +0800https://quicktasks.ismael.casimpan.com/post/copy-tables-to-backup-table-in-postgresql/Mon, 06 Sep 2021 09:28:45 +0800https://quicktasks.ismael.casimpan.com/post/copy-tables-to-backup-table-in-postgresql/ Copy tables to an _old as backup 1CREATE TABLE new_table AS 2TABLE existing_table; See details in https://www.postgresqltutorial.com/postgresql-copy-table/https://quicktasks.ismael.casimpan.com/post/verify-table-descriptions-in-postgresql-via-psql/Mon, 06 Sep 2021 09:28:45 +0800https://quicktasks.ismael.casimpan.com/post/verify-table-descriptions-in-postgresql-via-psql/ 1\d+ <table_name> Without the "+", only normal table descriptions will be shown.https://quicktasks.ismael.casimpan.com/post/rename-index-in-postgresql/Mon, 06 Sep 2021 09:27:45 +0800https://quicktasks.ismael.casimpan.com/post/rename-index-in-postgresql/ Rename an Index 1ALTER INDEX the_oldtablename_idx01 RENAME TO thenewtablename_idx01 NOTE: This has similar syntax for renaming primary key. The only difference noted is that for primary key, the suffix is always _pkey. In index, it's either idxNN or idexNN (where NN is a nunber, e.g. '01')https://quicktasks.ismael.casimpan.com/post/update-table-column-comments-in-postgresql/Mon, 06 Sep 2021 09:27:45 +0800https://quicktasks.ismael.casimpan.com/post/update-table-column-comments-in-postgresql/ Update comments on table columns 1COMMENT ON COLUMN <table_name>.<column_name> IS '<new_comment_here>'; See Stackoverflow reference and Postgres.org reference NOTE: Comment cannot be altered or dropped. To remove comment, set it to NULL as follows: 1COMMENT ON COLUMN <table_name>.<column_name> IS NULL;https://quicktasks.ismael.casimpan.com/post/rename-primary-key-in-postgresql/Mon, 06 Sep 2021 09:26:45 +0800https://quicktasks.ismael.casimpan.com/post/rename-primary-key-in-postgresql/ Rename a Primary Key 1ALTER INDEX the_oldtablename_pkey RENAME TO thenewtablename_pkey