POSITION

Given two input expressions, the POSITION function returns an integer value representing the starting position of the first expression within the second expression.

Syntax

POSITION (expression1 IN expression2)

Remarks

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This function uses the case-sensitivity setting of the TDV Server (TDV Server > SQL Engine > SQL Language > Case Sensitivity).

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POSITION accepts all string types and all numeric types as input arguments.

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The output is always an integer, provided that none of the input strings is NULL. Otherwise, NULL is returned.

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If either argument is NULL, the function returns NULL.

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If the first argument is a blank string, the function returns 1 (one).

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If the first argument is not found within the second argument, the function returns zero.

Note: See also the related function INSTR.

Examples

POSITION ('ec' IN 'lecture')

The output returned is 2, because ec starts at the second character position of expression2.

POSITION (' ' IN 'lecture')

The output returned is 0 because expression2 does not contain a space character.

POSITION ('' IN 'lecture')

The output returned is 1 because expression1 is the empty string.