IsNull function in DB2 SQL

Question

Is there a performant equivalent to the isnull function for DB2   Imagine some of our products are internal  so they don t have names   Select product id  isnull product name   Internal   From product   Might return   1 Socks  2 Shoes  3 Internal  4 Pants

User · Answer

I think COALESCE function partially similar to the isnull  but try it   Why don t you go for null handling functions through application programs  it is better alternative

User · Answer

Select Product ID  VALUE product Name   Internal   AS ProductName from Product

User · Answer

I think COALESCE function partially similar to the isnull  but try it   Why don t you go for null handling functions through application programs  it is better alternative

User · Answer

I m not familiar with DB2  but have you tried COALESCE   ie    SELECT Product ID  COALESCE product Name   Internal   AS ProductName FROM Product

User · Answer

In DB2 there is a function NVL field  value if null    Example   SELECT ID  NVL NAME   Internal  AS NAME  NVL PRICE 0  AS PRICE FROM PRODUCT WITH UR

User · Answer

I m not familiar with DB2  but have you tried COALESCE   ie    SELECT Product ID  COALESCE product Name   Internal   AS ProductName FROM Product

User · Answer

In DB2 there is a function NVL field  value if null    Example   SELECT ID  NVL NAME   Internal  AS NAME  NVL PRICE 0  AS PRICE FROM PRODUCT WITH UR

User · Answer

COALESCE function same  ISNULL function Note  you must use COALESCE function with same data type of column that you check is null

User · Answer

For what its worth  COALESCE is similiar but   IFNULL expr1  default    is the exact match you re looking for in DB2    COALESCE allows multiple arguments  returning the first NON NULL expression  whereas IFNULL only permits the expression and the default   Thus  SELECT product ID  IFNULL product Name   Internal   AS ProductName FROM Product   Gives you what you re looking for as well as the previous answers  just adding for completeness

User · Answer

I think COALESCE function partially similar to the isnull  but try it   Why don t you go for null handling functions through application programs  it is better alternative

User · Answer

For what its worth  COALESCE is similiar but   IFNULL expr1  default    is the exact match you re looking for in DB2    COALESCE allows multiple arguments  returning the first NON NULL expression  whereas IFNULL only permits the expression and the default   Thus  SELECT product ID  IFNULL product Name   Internal   AS ProductName FROM Product   Gives you what you re looking for as well as the previous answers  just adding for completeness

User · Answer

COALESCE function same  ISNULL function Note  you must use COALESCE function with same data type of column that you check is null

User · Answer

hope this might help someone else out there    SELECT       FROM XXX XX WHERE      AND         param1 IS NULL        OR XX param1   param1

User · Answer

Select Product ID  VALUE product Name   Internal   AS ProductName from Product

User · Answer

I m not familiar with DB2  but have you tried COALESCE   ie    SELECT Product ID  COALESCE product Name   Internal   AS ProductName FROM Product

User · Answer

I m not familiar with DB2  but have you tried COALESCE   ie    SELECT Product ID  COALESCE product Name   Internal   AS ProductName FROM Product

User · Answer

hope this might help someone else out there    SELECT       FROM XXX XX WHERE      AND         param1 IS NULL        OR XX param1   param1

User · Answer

I think COALESCE function partially similar to the isnull  but try it   Why don t you go for null handling functions through application programs  it is better alternative

[sql] IsNull function in DB2 SQL?

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