mysql三表查询sql语句
@陶忽5777：“mysql ”多表联合查询语句怎么写? -
娄雄15615765407…… 一使用SELECT子句进行多表查询SELECT 字段名 FROM 表1,表2 … WHERE 表1字段 = 表2字段 AND 其它查询条件SELECT a.id,a.name,a.address,a.date,b.math,b.english,b.chinese FROM tb_demo065_tel AS b,tb_demo065 AS a WHERE a....
@陶忽5777：mysql 三表查询 -
娄雄15615765407…… 这样写:SELECT S.SName AS 姓名, CS.CourseName AS 课程, C.Score AS 成绩 FROM Students AS S INNER JOIN Score AS C ON (S.SCode = C.StudentID) INNER JOIN Course AS CS ON (CS.CourseID = C.CourseID 扩展资料:SQL联...
@陶忽5777：MySQL三表联合查询 -
娄雄15615765407…… select PWD,GH,QX from student where GH = '特定值';
@陶忽5777：mysql 三表联合查询 -
娄雄15615765407…… 使用UNION联合两个语句即可:select * from a where cid=1 UNION select * from b where cid=1
@陶忽5777：mysql数据库三表都有关系的话,怎么写SQL语句,急急急! -
娄雄15615765407…… slect c.字段,d.字段 from (select a.字段,b.字段 from A表 left join b表 on a.id=b.id) as c left join c.id=d.id 先把2个表进行关联 在跟第3个表关联
@陶忽5777：求三表联合查询的SQL查询语句
娄雄15615765407…… select a.id,a.name,b.name,c.name,a.table2_id,a.table3_id,c.table2_id from table1 a,table2 b,table3 c where a.table2_id=b.id and a.table3_id=c.id and b.id=c.table2_id order by a.id; 以上语句在Oracle11g r2上测试通过,同样可以用于其他数据库,如有疑问请留言
@陶忽5777：数据库,三表子查询,用一条SQL语句,怎么写? -
娄雄15615765407…… 这里需要使用动态sql执行,参见下面代码,测试通过.declare @v_tabname varchar(20) SELECT @v_tabname=tx_name FROM Table1 WHERE id = '已知ID' exec('update table0 set count=count-1 where id in(select t0_id from '+@v_tabname+')') go
@陶忽5777：三表查询,求SQl语句 -
娄雄15615765407…… select a.id,a.data,t.data2,t.data3 from a left join(select cc.a_id,bb.data data2,cc.data data3 from (select a_id,data,rank() over (partition by a_id order by data) rn from C) cc full join (select a_id,data,rank() over (partition by a_id order by data) rn from B...
@陶忽5777：三表关联按ID查询sql怎么写 -
娄雄15615765407…… 比如有三张表,student,teacher , project :1. 第一种方法:select * from student,teacher,project where student.id=teacher.sid and student.id=project.sid;2. 第二种:select * from student inner join teacher on student.id=teacher.sid inner join project on student.id=project.sid;
@陶忽5777：mysql查询三个表语句怎么写呢?我这个为什么出错?
娄雄15615765407…… select * from client c,users u ,orders o where on c.hfid = u.userNo and c.hfid =o.userNo and c.isfw = 1 and c.type = 1 试试
娄雄15615765407…… 一使用SELECT子句进行多表查询SELECT 字段名 FROM 表1,表2 … WHERE 表1字段 = 表2字段 AND 其它查询条件SELECT a.id,a.name,a.address,a.date,b.math,b.english,b.chinese FROM tb_demo065_tel AS b,tb_demo065 AS a WHERE a....
@陶忽5777：mysql 三表查询 -
娄雄15615765407…… 这样写:SELECT S.SName AS 姓名, CS.CourseName AS 课程, C.Score AS 成绩 FROM Students AS S INNER JOIN Score AS C ON (S.SCode = C.StudentID) INNER JOIN Course AS CS ON (CS.CourseID = C.CourseID 扩展资料:SQL联...
@陶忽5777：MySQL三表联合查询 -
娄雄15615765407…… select PWD,GH,QX from student where GH = '特定值';
@陶忽5777：mysql 三表联合查询 -
娄雄15615765407…… 使用UNION联合两个语句即可:select * from a where cid=1 UNION select * from b where cid=1
@陶忽5777：mysql数据库三表都有关系的话,怎么写SQL语句,急急急! -
娄雄15615765407…… slect c.字段,d.字段 from (select a.字段,b.字段 from A表 left join b表 on a.id=b.id) as c left join c.id=d.id 先把2个表进行关联 在跟第3个表关联
@陶忽5777：求三表联合查询的SQL查询语句
娄雄15615765407…… select a.id,a.name,b.name,c.name,a.table2_id,a.table3_id,c.table2_id from table1 a,table2 b,table3 c where a.table2_id=b.id and a.table3_id=c.id and b.id=c.table2_id order by a.id; 以上语句在Oracle11g r2上测试通过,同样可以用于其他数据库,如有疑问请留言
@陶忽5777：数据库,三表子查询,用一条SQL语句,怎么写? -
娄雄15615765407…… 这里需要使用动态sql执行,参见下面代码,测试通过.declare @v_tabname varchar(20) SELECT @v_tabname=tx_name FROM Table1 WHERE id = '已知ID' exec('update table0 set count=count-1 where id in(select t0_id from '+@v_tabname+')') go
@陶忽5777：三表查询,求SQl语句 -
娄雄15615765407…… select a.id,a.data,t.data2,t.data3 from a left join(select cc.a_id,bb.data data2,cc.data data3 from (select a_id,data,rank() over (partition by a_id order by data) rn from C) cc full join (select a_id,data,rank() over (partition by a_id order by data) rn from B...
@陶忽5777：三表关联按ID查询sql怎么写 -
娄雄15615765407…… 比如有三张表,student,teacher , project :1. 第一种方法:select * from student,teacher,project where student.id=teacher.sid and student.id=project.sid;2. 第二种:select * from student inner join teacher on student.id=teacher.sid inner join project on student.id=project.sid;
@陶忽5777：mysql查询三个表语句怎么写呢?我这个为什么出错?
娄雄15615765407…… select * from client c,users u ,orders o where on c.hfid = u.userNo and c.hfid =o.userNo and c.isfw = 1 and c.type = 1 试试
