PostgreSQL 满足条件时插入数据
例如：当表中不存在某记录时，才插入这条记录。 INSERT INTO 表名(列名1, 列名2) SELECT '值1', '值2' WHERE NOT EXISTS ( SELECT * FROM 表名 WHERE 列名1 = '值1', 列名2 = '值2' ); 参考 PostgreSQL: Documentation: 10: INSERT This example inserts some rows into table films from a table tmp_films with the same column layout as films: INSERT INTO films SELECT * FROM tmp_films WHERE date_prod < '2004-05-07'; database - Conditional INSERT INTO statement in postgres - Stack Overflow