SQL Insert IF not exists loop

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Hi Friends,

I am stuck up with this query.
I want to insert 4 records in to the table for that am using the below query

SQL

IF NOT EXISTS(SELECT WS.ScheduleID FROM WaitingSchedules WS,@waitingSchedules_temp WST WHERE WST.ScheduleID = WS.ScheduleID)
            INSERT INTO WaitingSchedules SELECT ScheduleID,AppointmentStatus,InDt,OutDt,HasUpdated FROM @waitingSchedules_temp

Works fine for the scenario
If all the 4 records are not exist in the table then 4 records are inserted successfully.

Fails in the below scenario<br />
If first records is exist in table then remaining first and remaining 3 records are failed to insert in table.

Expected: I want to insert 4th record even if first/second/third id is exist in the table.Which means I want to insert a new record leaving previously existing records

I tried this

SQL

WHILE (@Count < @RowCount)
BEGIN

    IF NOT EXISTS (SELECT WS.ScheduleID FROM WaitingSchedules WS,@waitingSchedules_temp WST WHERE WST.ScheduleID = WS.ScheduleID)
    INSERT INTO WaitingSchedules SELECT ScheduleID,AppointmentStatus,InDt,OutDt,HasUpdated FROM @waitingSchedules_temp

    SET @Count = @Count + 1;
END

And also this

SQL

WHILE (NOT EXISTS(SELECT WS.ScheduleID FROM WaitingSchedules WS,@waitingSchedules_temp WST WHERE WST.ScheduleID = WS.ScheduleID))
            INSERT INTO WaitingSchedules SELECT ScheduleID,AppointmentStatus,InDt,OutDt,HasUpdated FROM @waitingSchedules_temp

But this also failed :(

Sample input:

I have 4 records like 6589, 6857, 1220, 4500
Now I want to insert into WaitingStatus Table by checking if the records are pre exist.
Working scenario:
If Waitingschedules table doesnt have all the 4 records then its inserting all successfully.

Failing scenario:
If Waitingschedules table has 6589(first record) then remaining records are not inserting even remaining records are not exist.

Please help me on this issue.

Thanks,
RK

Posted 19-Dec-13 2:03am

♥…ЯҠ…♥

Updated 19-Dec-13 2:34am

v5

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Maciej Los 19-Dec-13 8:28am

RK, please provide sample data and expected outtput. It would be easier to understand.

♥…ЯҠ…♥ 19-Dec-13 8:31am

Sure Maciej

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♥…ЯҠ…♥ · Accepted Answer · 2013-12-19T03:58:00

Hi,

I optimized the query further to insert not existed records,

Thanks Maciej Los for NOT IN concept(Wondering why I didnt think that ;-))
This is the query that I used

SQL

INSERT INTO WaitingSchedules SELECT ScheduleID,AppointmentStatus,InDt,OutDt,HasUpdated
            FROM @waitingSchedules_temp AS tmp
            WHERE (tmp.ScheduleID NOT IN (SELECT ScheduleID FROM WaitingSchedules))

Regards,
RK

Maciej Los · Accepted Answer · 2013-12-19T02:43:00

Have a look at example:

SQL

DECLARE @ws TABLE(ID INT)

INSERT INTO @ws (ID)
VALUES(6589)

SELECT ID
FROM @ws

INSERT INTO @ws (ID)
SELECT ID
FROM (
    SELECT 6589 AS ID UNION ALL
    SELECT 6857 AS ID UNION ALL
    SELECT 1220 AS ID UNION ALL
    SELECT 4500 AS ID
) AS T
WHERE ID NOT IN(SELECT ID FROM @ws)

SELECT ID
FROM @ws

Results:
1.query - before insert

ID
6589

2.query - after insert

Using CTE and list of ID's as a varchar variable:

SQL

DECLARE @ValuesToInsert VARCHAR(300) = '6589,6857,1220,4500'

--use CTE to split values
;WITH VTI AS 
(
	SELECT CONVERT(INT, LEFT(@ValuesToInsert, CHARINDEX(',', @ValuesToInsert)-1)) AS TID, RIGHT(@ValuesToInsert, LEN(@ValuesToInsert) - CHARINDEX(',', @ValuesToInsert)) AS Remainder
	WHERE CHARINDEX(',', @ValuesToInsert)>0
	UNION ALL
	SELECT CONVERT(INT, LEFT(Remainder, CHARINDEX(',', Remainder)-1)) AS TID, RIGHT(Remainder, LEN(Remainder) - CHARINDEX(',', Remainder)) AS Remainder
	FROM VTI
	WHERE CHARINDEX(',', Remainder)>0
	UNION ALL
	SELECT CONVERT(INT,Remainder) AS TID, NULL AS Remainder
	FROM VTI
	WHERE CHARINDEX(',', Remainder)=0
)
INSERT INTO @ws (ID)
SELECT ID 
FROM 
	(
	SELECT TID AS ID
	FROM VTI
	) AS T
WHERE ID NOT IN (SELECT ID FROM @ws)

SELECT ID
FROM @ws

Have a look at OriginalGriff's tip: Using comma separated value parameter strings in SQL IN clauses[^]

SQL Insert IF not exists loop

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