Null

Keyword NULL

AlaSQL supports NULL keyword.

Syntax:

    NULL

JavaScript emulation

AlaSQL uses undefined value to emulate SQL NULL constant instead of null.

NULL Constraint

You can set NULL column constraint. In this example the partname column can accept NULL values.

CREATE TABLE dbo.Parts (
  partid   INT         NOT NULL PRIMARY KEY,
  partname VARCHAR(25) NULL
);

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You can use NULLS LAST and NULLS FIRST in your sort order to determine the sorting

SELECT a, b FROM ? ORDER BY a ASC NULLS FIRST, b ASC NULLS LAST

See also: ISNULL, [NOT NULL](Not Null)