Question

我有4张桌子。 R，T，RT_imp和RT。

Table R (R_key, R_id)
Table T (T_key, T_id)
Table RT_imp (R_id, T_id, A,B,C)

使用这3个表我需要填充第4个表RT。

Table RT (R_key, T_key, A,B,C)

我需要找到id的相应键。（R的R_key与RT_imp的R_id相关，T_key与T_id的T_id相关，与A，B，C一起插入RT）

我需要在存储过程中执行此操作。我该怎么做？

Answer 1

这应该有效。我创建了临时表和别名，但您可以用表名替换它们。

Declare @R table (R_Key int, R_id int)
Declare @T table (T_Key int, T_id int)
Declare @RT_imp table (R_id int, T_id int, A char(1), B char(1), C char(1))
Declare @RT table (R_Key int, T_Key int, A char(1), B char(1), C char(1))

insert into @RT
    select r.R_Key
    , T_Key
    , rtimp.A
    , rtimp.B
    , rtimp.C
    from @RT_imp rtimp
    inner join @R r on r.R_id = rtimp.R_id
    inner join @T t on t.T_id = rtimp.T_id

Answer 2

create procedure insertdata
Declare @R table (R_Key int, R_id int)
Declare @T table (T_Key int, T_id int)
Declare @RT_imp table (R_id int, T_id int, A char(1), B char(1), C char(1))
Declare @RT table (R_Key int, T_Key int, A char(1), B char(1), C char(1))
AS
BEGIN
insert into @RT
    select r.R_Key, t.T_Key, rtimp.A, rtimp.B, rtimp.C
    from @RT_imp rtimp, @R r, @T t
where r.R_id = rtimp.R_id
and t.T_id = rtimp.T_id

END

在SQL中查找多个表

2 个答案: