摘要: sf=SELECT * FROMsaf=SELECT a.* FROMsbf=SELECT b.* FROMscf=SELECT c.* FROMsdf=SELECT d.* FROMsc=SELECT COUNT(1) FROMsct=SELECT COUNT(1) FROM user_table 阅读全文
posted @ 2017-12-06 13:58 *蓄势待发* 阅读(759) 评论(0) 推荐(0)