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create table check2_sql ( id int primary key auto_increment, ABC TEXT, XYZ TEXT ) Engine=MyISAM; INSERT INTO check2_sql (ABC, XYZ) VALUES ('AAA', 'BBB'); START TRANSACTION; ALTER TABLE check2_sql ADD COLUMN ABC_XYZ TEXT NOT NULL; UPDATE check2_sql SET ABC_XYZ = CONCAT(ABC, " ", XYZ); COMMIT; SELECT * FROM check2_sql; SHOW CREATE TABLE check2_sql;
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