sum
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Returns the sum of non-NULL records for <expr>. If all records inside a group are NULL, the function returns NULL.
Syntax
sum( <expr> )Arguments
<expr>
This is an expression that evaluates to a numeric data type.
Returns the sum of non-NULL records for <expr>. If all records inside a group are NULL, the function returns NULL.
sum( <expr> )<expr>This is an expression that evaluates to a numeric data type.