how to avoid null columns

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Hi to all,
How to avoid null columns in select statement?
In fact in my table in a single row there are multiple columns, some are null and some are not in a single row. So how to avoid them in select. I want to do that because I am showing these data in chart, so when it selects a null value the chart suddenly goes to 0(zero). So want to avoid that.

Thanks in advance.

Posted 28-Mar-13 0:50am

Avinash_Pathak

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RedDk 3-Apr-13 12:13pm

There's no way to chart anything using TSQL ... really. Might your custom app handle this? In TSQL I handle NULL another way using REPLACE([this],'NULL','{discontinutity}') in the SELECT clause. As I said, TSQL and "chart" does not compute considering such a void. Why NULL actually (not 0 meaning not a value)

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Maciej Los · Answer 1 · 2013-04-02T05:08:00

Use COALESCE[^] function.

SQL

DECLARE @temp TABLE (Value1 INT, Value2 INT)
 
INSERT INTO @temp (Value1, Value2)
VALUES  (500, NULL)
INSERT INTO @temp (Value1, Value2)
VALUES  (1001, NULL)
INSERT INTO @temp (Value1, Value2)
VALUES  (NULL, 4002)
INSERT INTO @temp (Value1, Value2)
VALUES  (NULL, 8003)
INSERT INTO @temp (Value1, Value2)
VALUES  (8521, NULL)
INSERT INTO @temp (Value1, Value2)
VALUES (NULL, 2647)

SELECT COALESCE(Value1,0) AS Value1, COALESCE(Value2,0) AS Value2
FROM @temp

Result:

Karruksen · Answer 2 · 2013-03-28T00:57:00

SQL

DECLARE @temp TABLE (ID INT, Value1 VARCHAR(20), Value2 VARCHAR(20))

INSERT INTO @temp
        (ID, Value1, Value2)
VALUES
        (1, 'Rajan', NULL),
        (3, 'Vijayan', NULL),
        (1, NULL, 'Ravi'),
        (3, NULL, 'sudeep'),
        (2, 'kumar', NULL),
        (2, NULL, 'venkat')

SELECT DISTINCT
   ID,
   (SELECT Value1 FROM @temp t2 WHERE t2.ID = t.ID AND Value1 IS NOT NULL) AS 'Value1',
   (SELECT Value2 FROM @temp t2 WHERE t2.ID = t.ID AND Value2 IS NOT NULL) AS 'Value2'
FROM
   @temp t

Pls Refer this Example.. may this help You...Try this..

how to avoid null columns

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