Firebird 2.1 Language Reference Update

Syntax:
MINVALUE (expr [, expr ...])
Internal functions
• If one or more expressions resolve to NULL, MINVALUE returns NULL. This behaviour differs
from the aggregate function MIN.
See also: MAXVALUE()
Available in: DSQL, PSQL
Added in: 2.1
MOD()
Description: Returns the remainder of an integer division.
Result type: INTEGER or BIGINT
Syntax:
MOD (a, b)
• Non-integer arguments are rounded before the division takes place. So, “7.5 mod 2.5” gives 2 (8
mod 3), not 0.
Important
If the external function MOD is declared in your database, it will override the internal function. To make the
internal function available, DROP or ALTER the external function (UDF).
Available in: DSQL, PSQL
Added in: 1.5
NULLIF()
Description: NULLIF returns the value of the first argument, unless it is equal to the second. In that case, NULL
is returned.
Result type: Depends on input.
Syntax:
Example:
NULLIF (, )
select avg( nullif(Weight, -1) ) from FatPeople
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