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CREATE TABLE XYZ ( CODE CHAR(34) ); INSERT INTO XYZ VALUES ('CODE'); INSERT INTO XYZ VALUES ('CODE1'); INSERT INTO XYZ VALUES ('COD'); INSERT INTO XYZ VALUES (''); SELECT * FROM XYZ; EXEC sp_rename 'XYZ.CODE', 'CODE2'; SELECT * FROM XYZ; ALTER TABLE XYZ ADD CODE CHAR(4); UPDATE XYZ SET CODE = SUBSTRING(CODE2, 1, 4); ALTER TABLE XYZ DROP COLUMN CODE2; SELECT * FROM XYZ;
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