sql-update

来源： https://stackoverflow.com/questions/47373774/update-with-join-with-bigquery

来源： https://stackoverflow.com/questions/5087950/sql-xquery-how-to-replace-text-in-update-query

来源： https://stackoverflow.com/questions/5087950/sql-xquery-how-to-replace-text-in-update-query

来源： https://stackoverflow.com/questions/63698573/update-column-from-one-to-many-join-with-datetime

来源： https://stackoverflow.com/questions/63775974/query-returning-ora-01427-single-row-subquery-returning-more-than-one-row

来源： https://stackoverflow.com/questions/63662032/lock-mysql-select-row-until-update-has-been-ran-on-it

来源： https://stackoverflow.com/questions/38103781/how-to-do-a-cascading-update

来源： https://stackoverflow.com/questions/63478175/a-raw-postgresql-query-hangs-when-executed-with-typeorm

问题 I have a bunch of pairs of values [(foo1, bar1), (foo2, bar2), ...] and I want to do a bunch of updates of "set the 'foo' column to 'foo1' where the 'bar' column is 'bar1'". I am doing this in Python with psycopg2. I could do executemany with the query UPDATE table SET foo = %s WHERE bar = %s , but that's a lot of little updates and would take mad long. How can I do this easily and fast? Perhaps something with a temp table? Postgres version 9.3. 回答1: UPDATE tbl t SET foo = v.foo FROM ( VALUES

问题 This seems simple but I can't seem to wrap my head around it... I am trying to update a table, set the columns equal to the result of a query which uses the ID column from the table which I am updating and uses a WITH() clause. I also only want to update the columns in my table where Fall_Term = 'Fall 2019' I will provide my pseudo code and my long nasty actual code... NOTE: My update statement works perfectly fine if I manually enter values for the ID column - PERSON_SKEY. For example,