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- remove en_US postfix - remove translated files (translation were moved to ts files earlier) - remove unused jQuery (python help doesn't use it anymore) - change expression label in QgsQueryBuilder and add context help (partly fixes #8129)
20 lines
691 B
Plaintext
20 lines
691 B
Plaintext
<h3>coalesce() function</h3>
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Returns the first non-NULL value from the expression list.
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<br>
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This function can take any number of arguments.
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<h4>Syntax</h4>
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<code>coalesce(expression1, expression2 ...)</code><br>
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<h4>Arguments</h4>
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<code>expression</code> - any valid expression or value, irregardless of type.
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<br>
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<h4>Example</h4>
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<!-- Show example of function.-->
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<code>coalesce(NULL, 2) → 2</code><br>
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<code>coalesce(NULL, 2, 3) → 2</code><br>
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<code>coalesce(7, NULL, 3*2) → 7</code><br><br>
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<code>coalesce("fieldA", "fallbackField", 'ERROR') → value of fieldA if it is non-NULL
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else the value of "fallbackField" or the string 'ERROR' if both are NULL</code><br>
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