You can't delete a column that has a CHECK constraint. You must first delete the constraint. If the column contains constraints or other dependencies, an error ...
ALTER TABLE adpwd ADD COLUMN IS_DELETE TINYINT(1) DEFAULT 0; ALTER TABLE ageofbuilding ADD COLUMN IS_DELETE TINYINT(1) DEFAULT 0; ALTER TABLE annualcost ADD COLUMN IS_DELETE TINYINT(1) DEFAULT 0; ...
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