Check before multirow inserting into databse in a batch

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SQL-Server-2005

Hi, experts,
I am using SQL Server 2008.
If I want to insert a row in a table, then I simply use the following query

SQL

insert into Table1 (Col1, Col2) values  ('EDJ','LP')

And if I wanna check before inserting then I follow

SQL

If not exists (select 1 from Table1 where Col1='EDJ' and  Col2='LP) 
begin 
insert into Table1 (Col1, Col2) values  ('EDJ','LP') 
end 
else 
begin 
Print 'Data already exist.' 
end

Now, for multirow inserting in a single query, I follow

SQL

insert into Table1 (Col1, Col2) values  ('EDJ', 'LP'), ('AGE', 'LP'), ('DJR', 'VG')

But if I wanna check for multirow insertion in a single batch, then what would be the query ???

Thanks in advance.

Posted 21-Feb-13 15:20pm

Member 9330747

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3 solutions

Solution 3

Hi,

Try like this

SQL

INSERT INTO table1(Col1,Col2)
SELECT D.Col1, D.Col2
FROM (SELECT 'EDJ' Col1, 'LP' Col2
      UNION ALL SELECT 'AGE', 'LP'
	 UNION ALL SELECT 'DJR', 'VG') D 
WHERE NOT EXISTS (SELECT 1 FROM Table1 WHERE Col1=D.Col1 AND Col2=D.Col2 )

In Case of Direct Insert like "INSERT INTO Table_Name (Column_Name) VALUES()..." Go for INSERT with SELECT Statement.

Regards,
GVPrabu

Posted 21-Feb-13 19:01pm

gvprabu

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Khorshed Alam, Dhaka · Accepted Answer · 2013-02-21T15:55:00

1. Insert the value in a table variable first.
2. Check the existence.
3. Insert or show message.

SQL

DECLARE @TmpTbl TABLE (Col1 VARCHAR(100), col2 VARCHAR(100))

INSERT INTO @TmpTbl(Col1,Col2)VALUES('EDJ','LP'), ('AGE', 'LP'), ('DJR', 'VG')
  
  IF NOT EXISTS(
         SELECT 1
         FROM   Table1 t1
                INNER JOIN @TmpTbl t2
                     ON  t.Col1 = t2.Col1
                     AND t1.Col2 = t2.Col2
     )
  BEGIN
      INSERT INTO Table1(Col1,Col2)
      SELECT Col1,Col2
      FROM   @TmpTbl tt
  END
  ELSE
  BEGIN
      PRINT 'Data already exist.'
  END

S. M. Ahasan Habib · Accepted Answer · 2013-02-21T16:31:00

My suggestion is you can explore tsql Merge statement if it is sql server specific problem.
Code sample

SQL

CREATE TABLE Target(FirstName varchar(10), LastName varchar(10));
GO

CREATE TABLE #Source(FirstName varchar(10), LastName varchar(10));
INSERT INTO #Source(FirstName, LastName) VALUES('A','B'), ('C','D'), ('E','F');

Merge [Target] AS T
Using (SELECT * FROM #Source) AS S
ON (T.FirstName = S.FirstName AND T.LastName = S.LastName)
WHEN NOT MATCHED BY Target THEN
	INSERT (FirstName, LastName) VALUES(S.FirstName, S.LastName);
--If you want to do something like insert/update/delete then you can use following statement
--WHEN MATCHED THEN
  --UPDATE SET T.FirstName = S.FirstName, T.LastName = S.LastName;

DROP TABLE #Source;

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Check before multirow inserting into databse in a batch

3 solutions

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