MySql 和 PostgreSQL 数据库 根据一张表update另一张表数据

postgre更新单列
UPDATE production_fix_event pfe
SET (bad_event_id) = (SELECT be.id FROM bad_event be WHERE pfe.key = be.key);

1:MySQL脚本

UPDATE TABLE A JOIN table2 b ON A.busid = b.busid
SET A.district = b.district;

2：PostgreSQL脚本
①、单列

UPDATE TABLE A
    SET ( district ) = ( SELECT district FROM table2 b WHERE A.site = b.site )
WHERE
    bustype = 1;

②、多列

UPDATE TABLE A
    SET ( column01, colum02, column03 ) = (
SELECT
    b.column01， b.column02,
    b.column03
FROM
    table2 b
WHERE
    A.COLUMN = b.COLUMN)

③　、定义行号，删除重复数据

DELETE 
FROM
    tableA 
WHERE
    ID IN (
SELECT ID 
FROM
    ( SELECT ROW_NUMBER () OVER ( PARTITION BY column01, column02 ), ID FROM tableA ) AS T 
WHERE
    T.ROW_NUMBER > 1 
    );