sqlserver查询数据库中有多少个表 sql server 数表:select count(1) from sysobjects where xtype='U'数视图:select count(1) from sysobjects where xtype='V'数存储过程select count(1) from sysobjects where xtype='P' SE
drop INDEX index_student_s_age on student ; drop INDEX index_student_s_no on student ; drop INDEX index_score_point on score ; drop INDEX index_score_c_id on score ; --建索引,建标语句中有,可忽略 CREATE INDEX ind
1、SQL语句: select u.*,r.*,r.id rid from user u left join sys_user_role sur on u.id = sur.userid left join sys_role r on sur.roleid = r.id 图片: 请点击输入图片描 请点击输入图片描述 注1:user(用户表),sys_role(角色