One Query Between 2 Tables

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Hi
i have 2 tables : Serials, ProdConfirm
i want to add 2 columns from Serials table to ProdConfirm table and both columns in tables are similar (i basically want to copy 2 columns to another table)

i have came up with a sql syntax but i cant add two tables at the same time
can some one help me ?

code :

SQL

INSERT INTO   ProdConfirm (Serial, [Group])
SELECT  Serial,[Group]
FROM Serials
WHERE [Group] = ?

i am using oledb

Posted 2-Jul-13 9:56am

KababChi

Updated 2-Jul-13 9:57am

v2

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Comments

thanh_bkhn 3-Jul-13 2:23am

What is the ProdConfirm table structure, and what is the rule of copying? You have to copy data from Serials to a record of the same "ID", or the ProdConfirm table is just empty, and you can copy 2 columns of all records into it?

2 solutions

Solution 1

If I understand you correctly, you have two columns in Table_1 and two columns in Table_2, both with the same data types. You want to combine these into a single data set, then insert the result into Table_3.

You can approach this by first creating a SELECT statement to get the single data set from the two tables. You can do this with a UNION:

SQL

SELECT Coll AS Column_A, Col2 AS Column_B
FROM Table_1

UNION

SELECT Col3 AS Column_A, Col4 AS Column_B
FROM Table_2

This will return a data set with two columns, populated by the intersection of data from the two tables. That is to say, each row will be distinct. If you need to get any duplicates, instead use UNION ALL You do not need to alias the column names, but if the same position (say, Col1 and Col3) have different names in the different tables, the resulting column in the data set will not have any name.

The second step is to use this for your insert. The result might look like this:

SQL

INSERT INTO Prod_Confirm (Serial, Group) (
  SELECT Col1 AS Serial, Col2 AS Group FROM Table_1
  UNION
  SELECT Col3 AS Serial, Col2 AS Group FROM Table_2
)

SQL will run the selection, then use the resulting data set for the insert.

Posted 2-Jul-13 10:19am

Gregory Gadow

Comments

KababChi 2-Jul-13 16:32pm

tnx for answering but NO i think u misunderstood
i want to copy 2 columns from Table 1 to Table 2
{again i cant even do UNION in my query because it generates sql error i cant figure a way to add relation between 2 tables}

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Qadri Jillani · Accepted Answer · 2013-07-02T20:12:00

Solution 2

1.First see the data types and size
( e.g varchar(36) ) of the desired columns in Serials table
by using:

SQL

sp_help Serials

2.Then by using alter table querry add those columns with same name, size, and data types in ProdConfirm table. simple!

Posted 2-Jul-13 20:12pm

Qadri Jillani