SQL query with COALESCE with IN operator

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Hi friends.

I write one query as below and it returns all customer records.

SQL

DECLARE @CODE AS VARCHAR(20)
SET @CODE = NULL
SELECT * FROM CUSTOMER WHERE CUSTOMER.CUS_NO = COALESCE(@CODE,CUSTOMER.CUS_NO)

If I set @code = '1004' then it returns only one customer with CUS_NO = 1004.

SQL

DECLARE @CODE AS VARCHAR(20)
SET @CODE = '1004'
SELECT * FROM CUSTOMER WHERE CUSTOMER.CUS_NO = COALESCE(@CODE,CUSTOMER.CUS_NO)

Now My requirement is here.

I want customers list with using IN operator. I want to set multiple customer number with single quote in @CODE variable and using IN operator, I want to get all customers.

Like as

SQL

DECLARE @CODE AS VARCHAR(20)
SET @CODE = '1004,1003'
SELECT * FROM CUSTOMER WHERE CUSTOMER.CUS_NO IN (COALESCE(@CODE,CUSTOMER.CUS_NO))

I know the above syntax is wrong for IN operator but I want result of customer 1004 and 1003 and If I set @CODE = null then it should return all records. If there is any other way to accomplish my task. I do not want to execute Inner Query like set query in string and then execute it by sp_executesql statement.

Thanks

Imrankhan

Posted 20-Sep-11 20:46pm

Imran Khan Pathan

Updated 20-Sep-11 20:58pm

André Kraak

v2

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4 solutions

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kishorekke · Answer 1 · 2011-09-20T21:29:00

Hi Fri.. Try the below code

SQL

CREATE TABLE #tempTable (CUS_NO  int  NOT NULL,)
DECLARE @CODE AS VARCHAR(20),
        @tbl       varchar(30),
        @delimiter char(1) = ',' ,
        @sql varchar(8000),
        @select varchar(8000)
SET @tbl='#tempTable'
SET @CODE = '1,2,3,4,1003'
SET @select = 'SELECT ' + REPLACE(@CODE, @delimiter, ' SELECT ')
SET @select = REPLACE(@select, '''', '''''')
SET @sql = 'INSERT ' + @tbl + ' EXEC(''' + @select + ''')'
EXEC (@sql)
SELECT * FROM CUSTOMER
WHERE CUSTOMER.CUS_NO IN (
                          (select distinct CUS_NO from #tempTable
                           UNION
                           select CUSTOMER.CUS_NO)
                          )
DROP TABLE #tempTable

Imran Khan Pathan · Answer 2 · 2011-09-20T21:48:00

Solution 2

Thanks for you feedback. But CUS_NO data type is nvarchar and your query gives me error "Conversion failed when converting the nvarchar value 'NYAUDI' to data type int" because one of value is "NYAUDI" that is not converted into int.

Posted 20-Sep-11 21:48pm

Imran Khan Pathan

Comments

kishorekke 21-Sep-11 3:56am

You can use Varchar insted int in that table like below

CREATE TABLE #tempTable (CUS_NO varchar(15))
DECLARE @CODE AS VARCHAR(20),
@tbl varchar(30),
@delimiter char(1) = ',' ,
@sql varchar(8000),
@select varchar(8000)
SET @tbl='#tempTable'
SET @CODE = '1,2,3,4,1003'
SET @select = 'SELECT ' + REPLACE(@CODE, @delimiter, ' SELECT ')
SET @select = REPLACE(@select, '''', '''''')
SET @sql = 'INSERT ' + @tbl + ' EXEC(''' + @select + ''')'
EXEC (@sql)
SELECT * FROM CUSTOMER
WHERE CUSTOMER.CUS_NO IN (
(select distinct CUS_NO from #tempTable
UNION
select CUSTOMER.CUS_NO)
)
DROP TABLE #tempTable

MaulikDusara · Answer 3 · 2011-09-20T22:25:00

Solution 3

hi,
TRY THIS.

SQL

DECLARE @CODE AS VARCHAR(20)
SET @CODE = '1004,1003'
SELECT * FROM CUSTOMER WHERE CUSTOMER.CUS_NO IN (CASE WHEN ISNULL(@CODE,0)=0 THEN CUSTOMER.CUS_NO ELSE @CODE END)

Posted 20-Sep-11 22:25pm

MaulikDusara

Imran Khan Pathan · Answer 4 · 2011-09-22T23:38:00

Hi.
I am using below code.

SQL

CREATE FUNCTION dbo.SplitOrderIDs
(
	@OrderList varchar(500)
)
RETURNS 
@ParsedList table
(
	OrderID int
)
AS
BEGIN
	DECLARE @OrderID varchar(10), @Pos int

	SET @OrderList = LTRIM(RTRIM(@OrderList))+ ','
	SET @Pos = CHARINDEX(',', @OrderList, 1)

	IF REPLACE(@OrderList, ',', '') <> ''
	BEGIN
		WHILE @Pos > 0
		BEGIN
			SET @OrderID = LTRIM(RTRIM(LEFT(@OrderList, @Pos - 1)))
			IF @OrderID <> ''
			BEGIN
				INSERT INTO @ParsedList (OrderID) 
				VALUES (CAST(@OrderID AS int)) --Use Appropriate conversion
			END
			SET @OrderList = RIGHT(@OrderList, LEN(@OrderList) - @Pos)
			SET @Pos = CHARINDEX(',', @OrderList, 1)

		END
	END	
	RETURN
END
GO

SQL

CREATE PROC dbo.GetOrderList6
(
	@OrderList varchar(500)
)
AS
BEGIN
	SET NOCOUNT ON
	
	SELECT 	o.OrderID, CustomerID, EmployeeID, OrderDate
	FROM	dbo.Orders AS o
		JOIN
		dbo.SplitOrderIDs(@OrderList) AS s
		ON
		o.OrderID = s.OrderID
END
GO

GRANT EXEC ON dbo.GetOrderList6 TO WebUser
GO

But if I pass @OrderList NULL or blank then it returns nothing. My requirement is if @orderlist has value then return only those records and if it is null or blank then returns all records.

Its returning records if I pass some value in @orderList but problem is when @OrderList is null or blank.
Thanks

SQL query with COALESCE with IN operator

4 solutions

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