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| - | ====== Omnidex SQL Function: $IFNULL ====== | ||
| - | ===== Description ===== | ||
| - | The $IFNULL function tests to see if the first expression produces a NULL, and if so, returns the second expression. | ||
| - | |||
| - | This function returns the same datatype as the passed parameter. If all passed parameters are NULL, then this function returns a NULL. | ||
| - | |||
| - | ===== Syntax ===== | ||
| - | |||
| - | $IFNULL ( expression_1, expression_2 ) | ||
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| - | == expression_1 and expression_2 == | ||
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| - | Required. An expression using SQL language that produces a value. A scalar expression is generally equivalent to a select item in the SQL SELECT statement, and can be a character expression, numeric expression or date expression. | ||
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| - | ===== Example ===== | ||
| - | ==== Example 1: $IFNULL against columns ==== | ||
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| - | <code> | ||
| - | > select $ifnull(name, 'Name not given') identifier from individuals; | ||
| - | |||
| - | IDENTIFIER | ||
| - | -------------------------------------------------- | ||
| - | MS. MARY LEWIS | ||
| - | MRS. ALICE R TOLLIVER | ||
| - | MR. SIDNEY K TOLLIVER | ||
| - | MRS. JENNIFER J HOPKINS | ||
| - | MR. CHARLIE HOPKINS | ||
| - | MS. KIMBERLY BLUE | ||
| - | KATHLEEN TUCKER | ||
| - | </code> | ||
| - | |||
| - | ====== Additional Resources ====== | ||
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| - | See also: | ||
| - | {{page>dev:sql:functions:see_also_logic&noheader&nofooter&noeditbtn}} | ||
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| - | ===== | ||