Question

here is my problem.

I have two tables,

Table1 –

id | Name | Code
1  | test | 4
2  | test | 5
3  | test4| 6
4  | test4| 7
5  | test | 8
6  | test | 9

Table2 –

id | Code
1  | 4
2  | 5
3  | 6
4  | 7
5  | 8
6  | 9

Here the Code column is the same in the both tables, what I’m trying is, I’m having the Code From Table2 AND I’m selecting the other table with it. For example

SELECT * FROM Table2 LEFT JOIN Table1.Code = Table2.Code WHERE Table2.Code = 4 , that’s fine, now I’m getting the results from both tables for the same Code, but now, from that point when I have Table1, I want to get All the rows With the same Name . The expected result I want is

id | Name | Code
1  | test | 4
2  | test | 5
5  | test | 8
6  | test | 9

Answer 1

You can try something like

SELECT  *
FROm    Table1 t1
WHERE   Name IN (
                    SELECT  t1.Name
                    FROM    Table1 t1 INNER JOIN
                            (
                                SELECT  id,
                                        Code
                                FROM    Table2 
                                WHERE   Table2.Code = 4
                            ) t2    ON  t1.id = t2.id
                                    AND t1.Code = t2.Code
                )

or even

SELECT  *
FROm    Table1 t1
WHERE   Name IN (
                    SELECT  t1.Name
                    FROM    Table2 t2 INNER JOIN
                            Table1 t1   ON  t2.id = t1.id
                                        AND t2.Code = t1.Code
                    WHERE   Table2.Code = 4
                )