Retrieval of Security Credentials

Syntax

difference(expr1,expr2)

Parameters

• expr1 – A character-type column name, variable, or constant expression of char, varchar, nchar, nvarchar, or unichar type.
• expr2 – Another character-type column name, variable, or constant expression of char, varchar, nchar, nvarchar, or unichar type.

Returns

If expr1 or expr2 are both not NULL, returns a value from 0 to 4 indicating the similarity between the two strings. The best match is 4.

If expr1 or expr2 is NULL, returns NULL.

Examples

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