在存储过程中联接SQL查询结果

我需要在存储过程中连接结果集，我尝试了这个查询，但它不正确

SELECT * FROM (SELECT Field1, Field2 FROM Table1 WHERE Field4='val1') A
INNER JOIN 
SELECT * FROM (SELECT Field1, Field3 FROM Table1 WHERE Field4='val2') b
ON A.Field1 = B. Fileld1

如何在存储过程中联接结果表？

尝试以下方法：

您不必两次使用SELECT*FROM

SELECT * FROM 
(SELECT Field1, Field2 FROM Table1 WHERE Field4='val1') A
INNER JOIN 
(SELECT Field1, Field3 FROM Table1 WHERE Field4='val2') b
ON A.Field1 = B. Fileld1

也许这会有帮助

With cte_sample AS ( SELECT Field1, Field2 FROM Table1 
WHERE Field4='val1' )
SELECT Field1, Field3 FROM Table1 AS a
INNER JOIN cte_sample ON a.Field1 = cte_sample.Field1 AND
WHERE a.Field4='val2'

---

您正在这样做（仅举一个例子）：

这是错误的。因为您不需要写两次

SELECT*FROM

。正确的一点是：

SELECT * FROM Table1 A 
INNER JOIN 
Table2 B 
ON A.FIELD1 = B.FIELD2

因此，您的查询应该是（包括创建过程）：

从同一个表中选择数据的其他方法是：

SELECT A.Field1,A.Field2,B.Field3 FROM Table1 A 
INNER JOIN 
Table1 B 
ON A.FIELD1 = B.FIELD1
WHERE A.Field4='VAL1'
AND B.Field4='VAL2'

“连接”在存储过程中的工作方式与纯T-SQL相同。你的加入是完全错误的。问：你到底想做什么？？？

CREATE PROCEDURE testJoining 
AS 
    SELECT * FROM 
        (SELECT FIELD1, Field2 FROM Table1 WHERE Field4='VAL1') A
    INNER JOIN 
        (SELECT FIELD1, Field3 FROM Table1 WHERE Field4='VAL2') B
    ON A.FIELD1 = B.FIELD1
GO

SELECT A.Field1,A.Field2,B.Field3 FROM Table1 A 
INNER JOIN 
Table1 B 
ON A.FIELD1 = B.FIELD1
WHERE A.Field4='VAL1'
AND B.Field4='VAL2'