집 >데이터 베이스 >MySQL 튜토리얼 >统计主表关联的满足一定条件的子表数量
统计主表关联的满足一定条件的子表数量 统计主表关联的子表数量: 其中znld是主表的id; 主表:specialcase 子表:to_zhuanan_xsczqk,to_zhuanan_xckcqz www.2cto.com String cxfSql = select ((select count(*) from to_zhuanan_xsczqk a,specialcase b wh
统计主表关联的满足一定条件的子表数量
统计主表关联的子表数量:
其中znld是主表的id;
主表:specialcase
子表:to_zhuanan_xsczqk,to_zhuanan_xckcqz
www.2cto.com
String cxfSql = "select ((select count(*) from to_zhuanan_xsczqk a,specialcase b where a.zhuanan_id=b.id and a.xsczqksj>=to_date('"+ time1+ "','yyyy-MM-dd') and a.xsczqksj
+ znId
+ "')+(select count(*) from to_zhuanan_xckcqz a,specialcase b where a.zhuanan_id=b.id and a.XCKCQZSJ>=to_date('"+ time1+ "','yyyy-MM-dd') and a.XCKCQZSJ
+ znId
+ "')) as shuliang from dual";