摘要: 1.NOT EXISTS 和 NOT IN SELECT COUNT(ca.aaa) FROM xx ca WHERE NOT EXISTS( SELECT label.* FROM xxx label WHERE label.aaa = ca.aaa ) SELECT COUNT(ca.aaa) 阅读全文
posted @ 2024-07-02 18:14 沐兮sc 阅读(14) 评论(0) 推荐(0) 编辑