Sql and updating one column
Just like the SELECT statement, you need to specify columns and a table, but the UPDATE statement also requires the new data you want to store.This data can be dynamic or static, but as in introduction, we'll use static strings or numbers to change data in a table.
Visit Stack Exchange Database Administrators Stack Exchange is a question and answer site for database professionals who wish to improve their database skills and learn from others in the community. Sign up to join this community CREATE TABLE one ( record_id SERIAL, one_first_var INTEGER, one_second_var INTEGER, one_third_var INTEGER ); INSERT INTO one (one_first_var, one_second_var, one_third_var) VALUES (1, 1, 1); INSERT INTO one (one_first_var, one_second_var, one_third_var) VALUES (2, 2, 2); INSERT INTO one (one_first_var, one_second_var, one_third_var) VALUES (3, 3, 3); CREATE TABLE two ( record_id SERIAL, two_first_var INTEGER, two_second_var INTEGER, two_third_var INTEGER ); INSERT INTO two (two_first_var, two_second_var, two_third_var) VALUES (21, 21, 21); INSERT INTO two (two_first_var, two_second_var, two_third_var) VALUES (22, 22, 22); INSERT INTO two (two_first_var, two_second_var, two_third_var) VALUES (23, 23, 23); WITH my_values AS ( SELECT one_first_var, one_second_var, one_third_var FROM one WHERE one_first_var = 2 ) UPDATE two SET two_first_var = my_values.one_first_var, two_second_var = my_values.one_second_var, two_third_var = my_values.one_third_var FROM my_values WHERE two_second_var = 22; UPDATE tgt SET Column1 = src.
You need a table in your statement, which must be spelled correctly.
Any mistakes in the table name and the SQL engine will give you an error.
Only the partitions (or subpartitions) listed are checked for matches, and a row that is not in any of these partitions or subpartitions is not updated, whether it satisfies the clause, are flagged as unsafe for statement-based replication.
(This is because the order in which the rows are updated determines which rows are ignored.) Such statements produce a warning in the error log when using statement-based mode and are written to the binary log using the row-based format when using mode.