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The IS NULL predicate is used to check for null values. To select the values for all rows that contain a null value for the manager number, you can specify: SELECT DEPTNO, DEPTNAME, ADMRDEPT FROM CORPDATA.DEPARTMENT WHERE MGRNO IS NULL
- IS NULL and IS NOT NULL Conditions - IBM
IS NULL and IS NOT NULL Conditions. The IS NULL condition is...
- Db2 12 - Db2 SQL - IFNULL scalar function - IBM
IFNULL scalar function. The IFNULL function returns the...
- IS NULL and IS NOT NULL Conditions - IBM
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.
A null value is a special value that DB2 interprets to mean that no data is present. A NULL value is different from a zero value or a field that contains spaces. A field with a NULL value is one that has been left blank during record creation.
IS NULL and IS NOT NULL Conditions. The IS NULL condition is satisfied if the term that immediately precedes the IS keyword specifies one of the following undefined values: The name of a column that contains a null value. An expression that evaluates to null.
IFNULL scalar function. The IFNULL function returns the first nonnull expression. IFNULL ( expression, expression) The schema is SYSIBM. IFNULL is identical to the COALESCE scalar function except that IFNULL is limited to two arguments instead of multiple arguments. For a description, see COALESCE scalar function.
31 paź 2008 · It is also possible to check a NULL value with an indicator variable. An indicator variable must be defined as 5I 0 and follow the variable that may hold a NULL value. If a NULL value is returned the indicator variable is set to -1 otherwise it is set to *Zeros
iSeries shops that have the "DB2 Query Manager and SQL Development Kit" installed (product 5722ST1) can use embedded SQL to access NULL-capable fields from inside an HLL program.
