DROP TABLE IF EXISTS t3; CREATE TABLE t3(c1 TINYINT NULL); SHOW TABLES; Tables_in_test t3 SHOW CREATE TABLE t3; Table Create Table t3 CREATE TABLE `t3` ( `c1` tinyint(4) DEFAULT NULL ) ENGINE=ENGINE DEFAULT CHARSET=latin1 ALTER TABLE t3 MODIFY c1 TINYINT UNSIGNED NULL; SHOW TABLES; Tables_in_test t3 SHOW CREATE TABLE t3; Table Create Table t3 CREATE TABLE `t3` ( `c1` tinyint(3) unsigned DEFAULT NULL ) ENGINE=ENGINE DEFAULT CHARSET=latin1 DROP TABLE t3; SHOW TABLES; Tables_in_test CREATE TABLE t3(c1 SMALLINT NULL); SHOW TABLES; Tables_in_test t3 SHOW CREATE TABLE t3; Table Create Table t3 CREATE TABLE `t3` ( `c1` smallint(6) DEFAULT NULL ) ENGINE=ENGINE DEFAULT CHARSET=latin1 ALTER TABLE t3 MODIFY c1 SMALLINT UNSIGNED NULL; SHOW TABLES; Tables_in_test t3 SHOW CREATE TABLE t3; Table Create Table t3 CREATE TABLE `t3` ( `c1` smallint(5) unsigned DEFAULT NULL ) ENGINE=ENGINE DEFAULT CHARSET=latin1 DROP TABLE t3; SHOW TABLES; Tables_in_test CREATE TABLE t3(c1 MEDIUMINT NULL); SHOW TABLES; Tables_in_test t3 SHOW CREATE TABLE t3; Table Create Table t3 CREATE TABLE `t3` ( `c1` mediumint(9) DEFAULT NULL ) ENGINE=ENGINE DEFAULT CHARSET=latin1 ALTER TABLE t3 MODIFY c1 MEDIUMINT UNSIGNED NULL; SHOW TABLES; Tables_in_test t3 SHOW CREATE TABLE t3; Table Create Table t3 CREATE TABLE `t3` ( `c1` mediumint(8) unsigned DEFAULT NULL ) ENGINE=ENGINE DEFAULT CHARSET=latin1 DROP TABLE t3; SHOW TABLES; Tables_in_test CREATE TABLE t3(c1 INT NULL); SHOW TABLES; Tables_in_test t3 SHOW CREATE TABLE t3; Table Create Table t3 CREATE TABLE `t3` ( `c1` int(11) DEFAULT NULL ) ENGINE=ENGINE DEFAULT CHARSET=latin1 ALTER TABLE t3 MODIFY c1 INT UNSIGNED NULL; SHOW TABLES; Tables_in_test t3 SHOW CREATE TABLE t3; Table Create Table t3 CREATE TABLE `t3` ( `c1` int(10) unsigned DEFAULT NULL ) ENGINE=ENGINE DEFAULT CHARSET=latin1 DROP TABLE t3; SHOW TABLES; Tables_in_test CREATE TABLE t3(c1 INTEGER NULL); SHOW TABLES; Tables_in_test t3 SHOW CREATE TABLE t3; Table Create Table t3 CREATE TABLE `t3` ( `c1` int(11) DEFAULT NULL ) ENGINE=ENGINE DEFAULT CHARSET=latin1 ALTER TABLE t3 MODIFY c1 INTEGER UNSIGNED NULL; SHOW TABLES; Tables_in_test t3 SHOW CREATE TABLE t3; Table Create Table t3 CREATE TABLE `t3` ( `c1` int(10) unsigned DEFAULT NULL ) ENGINE=ENGINE DEFAULT CHARSET=latin1 DROP TABLE t3; SHOW TABLES; Tables_in_test CREATE TABLE t3(c1 BIGINT NULL); SHOW TABLES; Tables_in_test t3 SHOW CREATE TABLE t3; Table Create Table t3 CREATE TABLE `t3` ( `c1` bigint(20) DEFAULT NULL ) ENGINE=ENGINE DEFAULT CHARSET=latin1 ALTER TABLE t3 MODIFY c1 BIGINT UNSIGNED NULL; SHOW TABLES; Tables_in_test t3 SHOW CREATE TABLE t3; Table Create Table t3 CREATE TABLE `t3` ( `c1` bigint(20) unsigned DEFAULT NULL ) ENGINE=ENGINE DEFAULT CHARSET=latin1 DROP TABLE t3; SHOW TABLES; Tables_in_test CREATE TABLE t3(c1 REAL NULL); SHOW TABLES; Tables_in_test t3 SHOW CREATE TABLE t3; Table Create Table t3 CREATE TABLE `t3` ( `c1` double DEFAULT NULL ) ENGINE=ENGINE DEFAULT CHARSET=latin1 ALTER TABLE t3 MODIFY c1 REAL UNSIGNED NULL; SHOW TABLES; Tables_in_test t3 SHOW CREATE TABLE t3; Table Create Table t3 CREATE TABLE `t3` ( `c1` double unsigned DEFAULT NULL ) ENGINE=ENGINE DEFAULT CHARSET=latin1 DROP TABLE t3; SHOW TABLES; Tables_in_test CREATE TABLE t3(c1 DOUBLE NULL); SHOW TABLES; Tables_in_test t3 SHOW CREATE TABLE t3; Table Create Table t3 CREATE TABLE `t3` ( `c1` double DEFAULT NULL ) ENGINE=ENGINE DEFAULT CHARSET=latin1 ALTER TABLE t3 MODIFY c1 DOUBLE UNSIGNED NULL; SHOW TABLES; Tables_in_test t3 SHOW CREATE TABLE t3; Table Create Table t3 CREATE TABLE `t3` ( `c1` double unsigned DEFAULT NULL ) ENGINE=ENGINE DEFAULT CHARSET=latin1 DROP TABLE t3; SHOW TABLES; Tables_in_test CREATE TABLE t3(c1 FLOAT NULL); SHOW TABLES; Tables_in_test t3 SHOW CREATE TABLE t3; Table Create Table t3 CREATE TABLE `t3` ( `c1` float DEFAULT NULL ) ENGINE=ENGINE DEFAULT CHARSET=latin1 ALTER TABLE t3 MODIFY c1 FLOAT UNSIGNED NULL; SHOW TABLES; Tables_in_test t3 SHOW CREATE TABLE t3; Table Create Table t3 CREATE TABLE `t3` ( `c1` float unsigned DEFAULT NULL ) ENGINE=ENGINE DEFAULT CHARSET=latin1 DROP TABLE t3; SHOW TABLES; Tables_in_test CREATE TABLE t3(c1 DECIMAL NULL); SHOW TABLES; Tables_in_test t3 SHOW CREATE TABLE t3; Table Create Table t3 CREATE TABLE `t3` ( `c1` decimal(10,0) DEFAULT NULL ) ENGINE=ENGINE DEFAULT CHARSET=latin1 ALTER TABLE t3 MODIFY c1 DECIMAL UNSIGNED NULL; SHOW TABLES; Tables_in_test t3 SHOW CREATE TABLE t3; Table Create Table t3 CREATE TABLE `t3` ( `c1` decimal(10,0) unsigned DEFAULT NULL ) ENGINE=ENGINE DEFAULT CHARSET=latin1 DROP TABLE t3; SHOW TABLES; Tables_in_test CREATE TABLE t3(c1 NUMERIC NULL); SHOW TABLES; Tables_in_test t3 SHOW CREATE TABLE t3; Table Create Table t3 CREATE TABLE `t3` ( `c1` decimal(10,0) DEFAULT NULL ) ENGINE=ENGINE DEFAULT CHARSET=latin1 ALTER TABLE t3 MODIFY c1 NUMERIC UNSIGNED NULL; SHOW TABLES; Tables_in_test t3 SHOW CREATE TABLE t3; Table Create Table t3 CREATE TABLE `t3` ( `c1` decimal(10,0) unsigned DEFAULT NULL ) ENGINE=ENGINE DEFAULT CHARSET=latin1 DROP TABLE t3; SHOW TABLES; Tables_in_test CREATE TABLE t3(c1 TINYINT NULL); SHOW TABLES; Tables_in_test t3 SHOW CREATE TABLE t3; Table Create Table t3 CREATE TABLE `t3` ( `c1` tinyint(4) DEFAULT NULL ) ENGINE=ENGINE DEFAULT CHARSET=latin1 ALTER TABLE t3 CHANGE c1 c1 TINYINT UNSIGNED NULL; SHOW TABLES; Tables_in_test t3 SHOW CREATE TABLE t3; Table Create Table t3 CREATE TABLE `t3` ( `c1` tinyint(3) unsigned DEFAULT NULL ) ENGINE=ENGINE DEFAULT CHARSET=latin1 DROP TABLE t3; SHOW TABLES; Tables_in_test CREATE TABLE t3(c1 SMALLINT NULL); SHOW TABLES; Tables_in_test t3 SHOW CREATE TABLE t3; Table Create Table t3 CREATE TABLE `t3` ( `c1` smallint(6) DEFAULT NULL ) ENGINE=ENGINE DEFAULT CHARSET=latin1 ALTER TABLE t3 CHANGE c1 c1 SMALLINT UNSIGNED NULL; SHOW TABLES; Tables_in_test t3 SHOW CREATE TABLE t3; Table Create Table t3 CREATE TABLE `t3` ( `c1` smallint(5) unsigned DEFAULT NULL ) ENGINE=ENGINE DEFAULT CHARSET=latin1 DROP TABLE t3; SHOW TABLES; Tables_in_test CREATE TABLE t3(c1 MEDIUMINT NULL); SHOW TABLES; Tables_in_test t3 SHOW CREATE TABLE t3; Table Create Table t3 CREATE TABLE `t3` ( `c1` mediumint(9) DEFAULT NULL ) ENGINE=ENGINE DEFAULT CHARSET=latin1 ALTER TABLE t3 CHANGE c1 c1 MEDIUMINT UNSIGNED NULL; SHOW TABLES; Tables_in_test t3 SHOW CREATE TABLE t3; Table Create Table t3 CREATE TABLE `t3` ( `c1` mediumint(8) unsigned DEFAULT NULL ) ENGINE=ENGINE DEFAULT CHARSET=latin1 DROP TABLE t3; SHOW TABLES; Tables_in_test CREATE TABLE t3(c1 INT NULL); SHOW TABLES; Tables_in_test t3 SHOW CREATE TABLE t3; Table Create Table t3 CREATE TABLE `t3` ( `c1` int(11) DEFAULT NULL ) ENGINE=ENGINE DEFAULT CHARSET=latin1 ALTER TABLE t3 CHANGE c1 c1 INT UNSIGNED NULL; SHOW TABLES; Tables_in_test t3 SHOW CREATE TABLE t3; Table Create Table t3 CREATE TABLE `t3` ( `c1` int(10) unsigned DEFAULT NULL ) ENGINE=ENGINE DEFAULT CHARSET=latin1 DROP TABLE t3; SHOW TABLES; Tables_in_test CREATE TABLE t3(c1 INTEGER NULL); SHOW TABLES; Tables_in_test t3 SHOW CREATE TABLE t3; Table Create Table t3 CREATE TABLE `t3` ( `c1` int(11) DEFAULT NULL ) ENGINE=ENGINE DEFAULT CHARSET=latin1 ALTER TABLE t3 CHANGE c1 c1 INTEGER UNSIGNED NULL; SHOW TABLES; Tables_in_test t3 SHOW CREATE TABLE t3; Table Create Table t3 CREATE TABLE `t3` ( `c1` int(10) unsigned DEFAULT NULL ) ENGINE=ENGINE DEFAULT CHARSET=latin1 DROP TABLE t3; SHOW TABLES; Tables_in_test CREATE TABLE t3(c1 BIGINT NULL); SHOW TABLES; Tables_in_test t3 SHOW CREATE TABLE t3; Table Create Table t3 CREATE TABLE `t3` ( `c1` bigint(20) DEFAULT NULL ) ENGINE=ENGINE DEFAULT CHARSET=latin1 ALTER TABLE t3 CHANGE c1 c1 BIGINT UNSIGNED NULL; SHOW TABLES; Tables_in_test t3 SHOW CREATE TABLE t3; Table Create Table t3 CREATE TABLE `t3` ( `c1` bigint(20) unsigned DEFAULT NULL ) ENGINE=ENGINE DEFAULT CHARSET=latin1 DROP TABLE t3; SHOW TABLES; Tables_in_test CREATE TABLE t3(c1 REAL NULL); SHOW TABLES; Tables_in_test t3 SHOW CREATE TABLE t3; Table Create Table t3 CREATE TABLE `t3` ( `c1` double DEFAULT NULL ) ENGINE=ENGINE DEFAULT CHARSET=latin1 ALTER TABLE t3 CHANGE c1 c1 REAL UNSIGNED NULL; SHOW TABLES; Tables_in_test t3 SHOW CREATE TABLE t3; Table Create Table t3 CREATE TABLE `t3` ( `c1` double unsigned DEFAULT NULL ) ENGINE=ENGINE DEFAULT CHARSET=latin1 DROP TABLE t3; SHOW TABLES; Tables_in_test CREATE TABLE t3(c1 DOUBLE NULL); SHOW TABLES; Tables_in_test t3 SHOW CREATE TABLE t3; Table Create Table t3 CREATE TABLE `t3` ( `c1` double DEFAULT NULL ) ENGINE=ENGINE DEFAULT CHARSET=latin1 ALTER TABLE t3 CHANGE c1 c1 DOUBLE UNSIGNED NULL; SHOW TABLES; Tables_in_test t3 SHOW CREATE TABLE t3; Table Create Table t3 CREATE TABLE `t3` ( `c1` double unsigned DEFAULT NULL ) ENGINE=ENGINE DEFAULT CHARSET=latin1 DROP TABLE t3; SHOW TABLES; Tables_in_test CREATE TABLE t3(c1 FLOAT NULL); SHOW TABLES; Tables_in_test t3 SHOW CREATE TABLE t3; Table Create Table t3 CREATE TABLE `t3` ( `c1` float DEFAULT NULL ) ENGINE=ENGINE DEFAULT CHARSET=latin1 ALTER TABLE t3 CHANGE c1 c1 FLOAT UNSIGNED NULL; SHOW TABLES; Tables_in_test t3 SHOW CREATE TABLE t3; Table Create Table t3 CREATE TABLE `t3` ( `c1` float unsigned DEFAULT NULL ) ENGINE=ENGINE DEFAULT CHARSET=latin1 DROP TABLE t3; SHOW TABLES; Tables_in_test CREATE TABLE t3(c1 DECIMAL NULL); SHOW TABLES; Tables_in_test t3 SHOW CREATE TABLE t3; Table Create Table t3 CREATE TABLE `t3` ( `c1` decimal(10,0) DEFAULT NULL ) ENGINE=ENGINE DEFAULT CHARSET=latin1 ALTER TABLE t3 CHANGE c1 c1 DECIMAL UNSIGNED NULL; SHOW TABLES; Tables_in_test t3 SHOW CREATE TABLE t3; Table Create Table t3 CREATE TABLE `t3` ( `c1` decimal(10,0) unsigned DEFAULT NULL ) ENGINE=ENGINE DEFAULT CHARSET=latin1 DROP TABLE t3; SHOW TABLES; Tables_in_test CREATE TABLE t3(c1 NUMERIC NULL); SHOW TABLES; Tables_in_test t3 SHOW CREATE TABLE t3; Table Create Table t3 CREATE TABLE `t3` ( `c1` decimal(10,0) DEFAULT NULL ) ENGINE=ENGINE DEFAULT CHARSET=latin1 ALTER TABLE t3 CHANGE c1 c1 NUMERIC UNSIGNED NULL; SHOW TABLES; Tables_in_test t3 SHOW CREATE TABLE t3; Table Create Table t3 CREATE TABLE `t3` ( `c1` decimal(10,0) unsigned DEFAULT NULL ) ENGINE=ENGINE DEFAULT CHARSET=latin1 DROP TABLE t3; SHOW TABLES; Tables_in_test CREATE TABLE t3(c1 TINYINT NOT NULL); SHOW TABLES; Tables_in_test t3 SHOW CREATE TABLE t3; Table Create Table t3 CREATE TABLE `t3` ( `c1` tinyint(4) NOT NULL ) ENGINE=ENGINE DEFAULT CHARSET=latin1 ALTER TABLE t3 MODIFY c1 TINYINT UNSIGNED NOT NULL; SHOW TABLES; Tables_in_test t3 SHOW CREATE TABLE t3; Table Create Table t3 CREATE TABLE `t3` ( `c1` tinyint(3) unsigned NOT NULL ) ENGINE=ENGINE DEFAULT CHARSET=latin1 DROP TABLE t3; SHOW TABLES; Tables_in_test CREATE TABLE t3(c1 SMALLINT NOT NULL); SHOW TABLES; Tables_in_test t3 SHOW CREATE TABLE t3; Table Create Table t3 CREATE TABLE `t3` ( `c1` smallint(6) NOT NULL ) ENGINE=ENGINE DEFAULT CHARSET=latin1 ALTER TABLE t3 MODIFY c1 SMALLINT UNSIGNED NOT NULL; SHOW TABLES; Tables_in_test t3 SHOW CREATE TABLE t3; Table Create Table t3 CREATE TABLE `t3` ( `c1` smallint(5) unsigned NOT NULL ) ENGINE=ENGINE DEFAULT CHARSET=latin1 DROP TABLE t3; SHOW TABLES; Tables_in_test CREATE TABLE t3(c1 MEDIUMINT NOT NULL); SHOW TABLES; Tables_in_test t3 SHOW CREATE TABLE t3; Table Create Table t3 CREATE TABLE `t3` ( `c1` mediumint(9) NOT NULL ) ENGINE=ENGINE DEFAULT CHARSET=latin1 ALTER TABLE t3 MODIFY c1 MEDIUMINT UNSIGNED NOT NULL; SHOW TABLES; Tables_in_test t3 SHOW CREATE TABLE t3; Table Create Table t3 CREATE TABLE `t3` ( `c1` mediumint(8) unsigned NOT NULL ) ENGINE=ENGINE DEFAULT CHARSET=latin1 DROP TABLE t3; SHOW TABLES; Tables_in_test CREATE TABLE t3(c1 INT NOT NULL); SHOW TABLES; Tables_in_test t3 SHOW CREATE TABLE t3; Table Create Table t3 CREATE TABLE `t3` ( `c1` int(11) NOT NULL ) ENGINE=ENGINE DEFAULT CHARSET=latin1 ALTER TABLE t3 MODIFY c1 INT UNSIGNED NOT NULL; SHOW TABLES; Tables_in_test t3 SHOW CREATE TABLE t3; Table Create Table t3 CREATE TABLE `t3` ( `c1` int(10) unsigned NOT NULL ) ENGINE=ENGINE DEFAULT CHARSET=latin1 DROP TABLE t3; SHOW TABLES; Tables_in_test CREATE TABLE t3(c1 INTEGER NOT NULL); SHOW TABLES; Tables_in_test t3 SHOW CREATE TABLE t3; Table Create Table t3 CREATE TABLE `t3` ( `c1` int(11) NOT NULL ) ENGINE=ENGINE DEFAULT CHARSET=latin1 ALTER TABLE t3 MODIFY c1 INTEGER UNSIGNED NOT NULL; SHOW TABLES; Tables_in_test t3 SHOW CREATE TABLE t3; Table Create Table t3 CREATE TABLE `t3` ( `c1` int(10) unsigned NOT NULL ) ENGINE=ENGINE DEFAULT CHARSET=latin1 DROP TABLE t3; SHOW TABLES; Tables_in_test CREATE TABLE t3(c1 BIGINT NOT NULL); SHOW TABLES; Tables_in_test t3 SHOW CREATE TABLE t3; Table Create Table t3 CREATE TABLE `t3` ( `c1` bigint(20) NOT NULL ) ENGINE=ENGINE DEFAULT CHARSET=latin1 ALTER TABLE t3 MODIFY c1 BIGINT UNSIGNED NOT NULL; SHOW TABLES; Tables_in_test t3 SHOW CREATE TABLE t3; Table Create Table t3 CREATE TABLE `t3` ( `c1` bigint(20) unsigned NOT NULL ) ENGINE=ENGINE DEFAULT CHARSET=latin1 DROP TABLE t3; SHOW TABLES; Tables_in_test CREATE TABLE t3(c1 REAL NOT NULL); SHOW TABLES; Tables_in_test t3 SHOW CREATE TABLE t3; Table Create Table t3 CREATE TABLE `t3` ( `c1` double NOT NULL ) ENGINE=ENGINE DEFAULT CHARSET=latin1 ALTER TABLE t3 MODIFY c1 REAL UNSIGNED NOT NULL; SHOW TABLES; Tables_in_test t3 SHOW CREATE TABLE t3; Table Create Table t3 CREATE TABLE `t3` ( `c1` double unsigned NOT NULL ) ENGINE=ENGINE DEFAULT CHARSET=latin1 DROP TABLE t3; SHOW TABLES; Tables_in_test CREATE TABLE t3(c1 DOUBLE NOT NULL); SHOW TABLES; Tables_in_test t3 SHOW CREATE TABLE t3; Table Create Table t3 CREATE TABLE `t3` ( `c1` double NOT NULL ) ENGINE=ENGINE DEFAULT CHARSET=latin1 ALTER TABLE t3 MODIFY c1 DOUBLE UNSIGNED NOT NULL; SHOW TABLES; Tables_in_test t3 SHOW CREATE TABLE t3; Table Create Table t3 CREATE TABLE `t3` ( `c1` double unsigned NOT NULL ) ENGINE=ENGINE DEFAULT CHARSET=latin1 DROP TABLE t3; SHOW TABLES; Tables_in_test CREATE TABLE t3(c1 FLOAT NOT NULL); SHOW TABLES; Tables_in_test t3 SHOW CREATE TABLE t3; Table Create Table t3 CREATE TABLE `t3` ( `c1` float NOT NULL ) ENGINE=ENGINE DEFAULT CHARSET=latin1 ALTER TABLE t3 MODIFY c1 FLOAT UNSIGNED NOT NULL; SHOW TABLES; Tables_in_test t3 SHOW CREATE TABLE t3; Table Create Table t3 CREATE TABLE `t3` ( `c1` float unsigned NOT NULL ) ENGINE=ENGINE DEFAULT CHARSET=latin1 DROP TABLE t3; SHOW TABLES; Tables_in_test CREATE TABLE t3(c1 DECIMAL NOT NULL); SHOW TABLES; Tables_in_test t3 SHOW CREATE TABLE t3; Table Create Table t3 CREATE TABLE `t3` ( `c1` decimal(10,0) NOT NULL ) ENGINE=ENGINE DEFAULT CHARSET=latin1 ALTER TABLE t3 MODIFY c1 DECIMAL UNSIGNED NOT NULL; SHOW TABLES; Tables_in_test t3 SHOW CREATE TABLE t3; Table Create Table t3 CREATE TABLE `t3` ( `c1` decimal(10,0) unsigned NOT NULL ) ENGINE=ENGINE DEFAULT CHARSET=latin1 DROP TABLE t3; SHOW TABLES; Tables_in_test CREATE TABLE t3(c1 NUMERIC NOT NULL); SHOW TABLES; Tables_in_test t3 SHOW CREATE TABLE t3; Table Create Table t3 CREATE TABLE `t3` ( `c1` decimal(10,0) NOT NULL ) ENGINE=ENGINE DEFAULT CHARSET=latin1 ALTER TABLE t3 MODIFY c1 NUMERIC UNSIGNED NOT NULL; SHOW TABLES; Tables_in_test t3 SHOW CREATE TABLE t3; Table Create Table t3 CREATE TABLE `t3` ( `c1` decimal(10,0) unsigned NOT NULL ) ENGINE=ENGINE DEFAULT CHARSET=latin1 DROP TABLE t3; SHOW TABLES; Tables_in_test CREATE TABLE t3(c1 TINYINT NOT NULL); SHOW TABLES; Tables_in_test t3 SHOW CREATE TABLE t3; Table Create Table t3 CREATE TABLE `t3` ( `c1` tinyint(4) NOT NULL ) ENGINE=ENGINE DEFAULT CHARSET=latin1 ALTER TABLE t3 CHANGE c1 c1 TINYINT UNSIGNED NOT NULL; SHOW TABLES; Tables_in_test t3 SHOW CREATE TABLE t3; Table Create Table t3 CREATE TABLE `t3` ( `c1` tinyint(3) unsigned NOT NULL ) ENGINE=ENGINE DEFAULT CHARSET=latin1 DROP TABLE t3; SHOW TABLES; Tables_in_test CREATE TABLE t3(c1 SMALLINT NOT NULL); SHOW TABLES; Tables_in_test t3 SHOW CREATE TABLE t3; Table Create Table t3 CREATE TABLE `t3` ( `c1` smallint(6) NOT NULL ) ENGINE=ENGINE DEFAULT CHARSET=latin1 ALTER TABLE t3 CHANGE c1 c1 SMALLINT UNSIGNED NOT NULL; SHOW TABLES; Tables_in_test t3 SHOW CREATE TABLE t3; Table Create Table t3 CREATE TABLE `t3` ( `c1` smallint(5) unsigned NOT NULL ) ENGINE=ENGINE DEFAULT CHARSET=latin1 DROP TABLE t3; SHOW TABLES; Tables_in_test CREATE TABLE t3(c1 MEDIUMINT NOT NULL); SHOW TABLES; Tables_in_test t3 SHOW CREATE TABLE t3; Table Create Table t3 CREATE TABLE `t3` ( `c1` mediumint(9) NOT NULL ) ENGINE=ENGINE DEFAULT CHARSET=latin1 ALTER TABLE t3 CHANGE c1 c1 MEDIUMINT UNSIGNED NOT NULL; SHOW TABLES; Tables_in_test t3 SHOW CREATE TABLE t3; Table Create Table t3 CREATE TABLE `t3` ( `c1` mediumint(8) unsigned NOT NULL ) ENGINE=ENGINE DEFAULT CHARSET=latin1 DROP TABLE t3; SHOW TABLES; Tables_in_test CREATE TABLE t3(c1 INT NOT NULL); SHOW TABLES; Tables_in_test t3 SHOW CREATE TABLE t3; Table Create Table t3 CREATE TABLE `t3` ( `c1` int(11) NOT NULL ) ENGINE=ENGINE DEFAULT CHARSET=latin1 ALTER TABLE t3 CHANGE c1 c1 INT UNSIGNED NOT NULL; SHOW TABLES; Tables_in_test t3 SHOW CREATE TABLE t3; Table Create Table t3 CREATE TABLE `t3` ( `c1` int(10) unsigned NOT NULL ) ENGINE=ENGINE DEFAULT CHARSET=latin1 DROP TABLE t3; SHOW TABLES; Tables_in_test CREATE TABLE t3(c1 INTEGER NOT NULL); SHOW TABLES; Tables_in_test t3 SHOW CREATE TABLE t3; Table Create Table t3 CREATE TABLE `t3` ( `c1` int(11) NOT NULL ) ENGINE=ENGINE DEFAULT CHARSET=latin1 ALTER TABLE t3 CHANGE c1 c1 INTEGER UNSIGNED NOT NULL; SHOW TABLES; Tables_in_test t3 SHOW CREATE TABLE t3; Table Create Table t3 CREATE TABLE `t3` ( `c1` int(10) unsigned NOT NULL ) ENGINE=ENGINE DEFAULT CHARSET=latin1 DROP TABLE t3; SHOW TABLES; Tables_in_test CREATE TABLE t3(c1 BIGINT NOT NULL); SHOW TABLES; Tables_in_test t3 SHOW CREATE TABLE t3; Table Create Table t3 CREATE TABLE `t3` ( `c1` bigint(20) NOT NULL ) ENGINE=ENGINE DEFAULT CHARSET=latin1 ALTER TABLE t3 CHANGE c1 c1 BIGINT UNSIGNED NOT NULL; SHOW TABLES; Tables_in_test t3 SHOW CREATE TABLE t3; Table Create Table t3 CREATE TABLE `t3` ( `c1` bigint(20) unsigned NOT NULL ) ENGINE=ENGINE DEFAULT CHARSET=latin1 DROP TABLE t3; SHOW TABLES; Tables_in_test CREATE TABLE t3(c1 REAL NOT NULL); SHOW TABLES; Tables_in_test t3 SHOW CREATE TABLE t3; Table Create Table t3 CREATE TABLE `t3` ( `c1` double NOT NULL ) ENGINE=ENGINE DEFAULT CHARSET=latin1 ALTER TABLE t3 CHANGE c1 c1 REAL UNSIGNED NOT NULL; SHOW TABLES; Tables_in_test t3 SHOW CREATE TABLE t3; Table Create Table t3 CREATE TABLE `t3` ( `c1` double unsigned NOT NULL ) ENGINE=ENGINE DEFAULT CHARSET=latin1 DROP TABLE t3; SHOW TABLES; Tables_in_test CREATE TABLE t3(c1 DOUBLE NOT NULL); SHOW TABLES; Tables_in_test t3 SHOW CREATE TABLE t3; Table Create Table t3 CREATE TABLE `t3` ( `c1` double NOT NULL ) ENGINE=ENGINE DEFAULT CHARSET=latin1 ALTER TABLE t3 CHANGE c1 c1 DOUBLE UNSIGNED NOT NULL; SHOW TABLES; Tables_in_test t3 SHOW CREATE TABLE t3; Table Create Table t3 CREATE TABLE `t3` ( `c1` double unsigned NOT NULL ) ENGINE=ENGINE DEFAULT CHARSET=latin1 DROP TABLE t3; SHOW TABLES; Tables_in_test CREATE TABLE t3(c1 FLOAT NOT NULL); SHOW TABLES; Tables_in_test t3 SHOW CREATE TABLE t3; Table Create Table t3 CREATE TABLE `t3` ( `c1` float NOT NULL ) ENGINE=ENGINE DEFAULT CHARSET=latin1 ALTER TABLE t3 CHANGE c1 c1 FLOAT UNSIGNED NOT NULL; SHOW TABLES; Tables_in_test t3 SHOW CREATE TABLE t3; Table Create Table t3 CREATE TABLE `t3` ( `c1` float unsigned NOT NULL ) ENGINE=ENGINE DEFAULT CHARSET=latin1 DROP TABLE t3; SHOW TABLES; Tables_in_test CREATE TABLE t3(c1 DECIMAL NOT NULL); SHOW TABLES; Tables_in_test t3 SHOW CREATE TABLE t3; Table Create Table t3 CREATE TABLE `t3` ( `c1` decimal(10,0) NOT NULL ) ENGINE=ENGINE DEFAULT CHARSET=latin1 ALTER TABLE t3 CHANGE c1 c1 DECIMAL UNSIGNED NOT NULL; SHOW TABLES; Tables_in_test t3 SHOW CREATE TABLE t3; Table Create Table t3 CREATE TABLE `t3` ( `c1` decimal(10,0) unsigned NOT NULL ) ENGINE=ENGINE DEFAULT CHARSET=latin1 DROP TABLE t3; SHOW TABLES; Tables_in_test CREATE TABLE t3(c1 NUMERIC NOT NULL); SHOW TABLES; Tables_in_test t3 SHOW CREATE TABLE t3; Table Create Table t3 CREATE TABLE `t3` ( `c1` decimal(10,0) NOT NULL ) ENGINE=ENGINE DEFAULT CHARSET=latin1 ALTER TABLE t3 CHANGE c1 c1 NUMERIC UNSIGNED NOT NULL; SHOW TABLES; Tables_in_test t3 SHOW CREATE TABLE t3; Table Create Table t3 CREATE TABLE `t3` ( `c1` decimal(10,0) unsigned NOT NULL ) ENGINE=ENGINE DEFAULT CHARSET=latin1 DROP TABLE t3; SHOW TABLES; Tables_in_test