sql语句联合查询
@法知3930：SQL联合查询语句 -
宦怀13547298750…… select 表1.a,表2.c from 表1 left join 表2 on 表1.b=表2.b --或者 select 表1.a,表2.c from 表1,表2 where 表1.b=表2.b
@法知3930：关于多表联合查询的SQL语句...求解释下.... -
宦怀13547298750…… --T-SQL语句表示如下,没什么可说的 就是多表条件联接而已,取F表不重复的条件联接下的所有记录 --输入参数为UserName,最后再以f.showorder排序 select distinct f.* from qx_grouppermit a,qx_usergroup b,xt_user c,qx_model d,qx_model e,...
@法知3930：两个sql 语句联合到一下查询
宦怀13547298750…… 联合就是用union或者union all如select * from aunionselect * from b union会排除掉2个select语句中重复的数据,所以执行速度会比union all慢
@法知3930：sql联合查询并统计的语句写法 -
宦怀13547298750…… SELECT ISNULL(组长名,姓名),SUM(计件数) FROM gg left join user on gg.姓名=user.员工名 group by ISNULL(组长名,姓名) 这样试一下
@法知3930：求一条联合查询的sql语句 -
宦怀13547298750…… select x.userid,x.distyname,y.dealname from (select userid,name as distyname from b left join a on b.cust_id=a.id where a.cust_type=1) x left join (select userid,name as dealname from b left join a on b.cust_id=a.id where a.cust_type=2) y on x.userid=y.userid
@法知3930：sql语句 联合查询,需要将两个表中两个字段做减法,若其中一个字段为 -
宦怀13547298750…… 先用一条子查询把空值格式化成0,然后再用连接查询 select a.id from (select case when price is null then 0 else price end from table1) a left join( select case when price is null then 0 else price end from table2 ) b on a.id=b.id where (a.price -b.price) >10
@法知3930：SQL联合查询,急! -
宦怀13547298750…… 大概你是指的这种联合查询 select field1, field2,... from t_kcgl_zzd union all select field1, field2,... from T_JCSJ_SPDA 对应的字段类型要相同或者可以隐性转换.
@法知3930：SQL多表联合查询 -
宦怀13547298750…… SELECT * from 表名 where 条件 UNION ALL SELECT * from 表名 where 条件
@法知3930：SQL两张表联合查询 -
宦怀13547298750…… select a.idd,a.name2,b.image2,a.name,a.image from a表 inner join b表 on a.tag2 = b.tag
@法知3930：sql联合查询怎么写
宦怀13547298750…… 用union all select interid,sum(mobile) as mobile from ( select interid,count(mobile) as mobile from mobile1 group by interid union all select interid,count(mobile) as mobile from mobile2 group by interid ) A group by interid order by interid
宦怀13547298750…… select 表1.a,表2.c from 表1 left join 表2 on 表1.b=表2.b --或者 select 表1.a,表2.c from 表1,表2 where 表1.b=表2.b
@法知3930：关于多表联合查询的SQL语句...求解释下.... -
宦怀13547298750…… --T-SQL语句表示如下,没什么可说的 就是多表条件联接而已,取F表不重复的条件联接下的所有记录 --输入参数为UserName,最后再以f.showorder排序 select distinct f.* from qx_grouppermit a,qx_usergroup b,xt_user c,qx_model d,qx_model e,...
@法知3930：两个sql 语句联合到一下查询
宦怀13547298750…… 联合就是用union或者union all如select * from aunionselect * from b union会排除掉2个select语句中重复的数据,所以执行速度会比union all慢
@法知3930：sql联合查询并统计的语句写法 -
宦怀13547298750…… SELECT ISNULL(组长名,姓名),SUM(计件数) FROM gg left join user on gg.姓名=user.员工名 group by ISNULL(组长名,姓名) 这样试一下
@法知3930：求一条联合查询的sql语句 -
宦怀13547298750…… select x.userid,x.distyname,y.dealname from (select userid,name as distyname from b left join a on b.cust_id=a.id where a.cust_type=1) x left join (select userid,name as dealname from b left join a on b.cust_id=a.id where a.cust_type=2) y on x.userid=y.userid
@法知3930：sql语句 联合查询,需要将两个表中两个字段做减法,若其中一个字段为 -
宦怀13547298750…… 先用一条子查询把空值格式化成0,然后再用连接查询 select a.id from (select case when price is null then 0 else price end from table1) a left join( select case when price is null then 0 else price end from table2 ) b on a.id=b.id where (a.price -b.price) >10
@法知3930：SQL联合查询,急! -
宦怀13547298750…… 大概你是指的这种联合查询 select field1, field2,... from t_kcgl_zzd union all select field1, field2,... from T_JCSJ_SPDA 对应的字段类型要相同或者可以隐性转换.
@法知3930：SQL多表联合查询 -
宦怀13547298750…… SELECT * from 表名 where 条件 UNION ALL SELECT * from 表名 where 条件
@法知3930：SQL两张表联合查询 -
宦怀13547298750…… select a.idd,a.name2,b.image2,a.name,a.image from a表 inner join b表 on a.tag2 = b.tag
@法知3930：sql联合查询怎么写
宦怀13547298750…… 用union all select interid,sum(mobile) as mobile from ( select interid,count(mobile) as mobile from mobile1 group by interid union all select interid,count(mobile) as mobile from mobile2 group by interid ) A group by interid order by interid
