MySQL :: MySQL 8.0 Reference Manual :: 13.7.7.10 SHOW CREATE TABLE Statement

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13.7.7.10 SHOW CREATE TABLE Statement

SHOW CREATE TABLE tbl_name

Shows the CREATE TABLE statement that creates the named table. To use this statement, you must have some privilege for the table. This statement also works with views.

mysql> SHOW CREATE TABLE t\G
*************************** 1. row ***************************
       Table: t
Create Table: CREATE TABLE `t` (
  `id` int(11) NOT NULL AUTO_INCREMENT,
  `s` char(60) DEFAULT NULL,
  PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4

As of MySQL 8.0.16, MySQL implements CHECK constraints and SHOW CREATE TABLE displays them. All CHECK constraints are displayed as table constraints. That is, a CHECK constraint originally specified as part of a column definition displays as a separate clause not part of the column definition. Example:

mysql> CREATE TABLE t1 (
         i1 INT CHECK (i1 <> 0),      -- column constraint
         i2 INT,
         CHECK (i2 > i1),             -- table constraint
         CHECK (i2 <> 0) NOT ENFORCED -- table constraint, not enforced
       );

mysql> SHOW CREATE TABLE t1\G
*************************** 1. row ***************************
       Table: t1
Create Table: CREATE TABLE `t1` (
  `i1` int(11) DEFAULT NULL,
  `i2` int(11) DEFAULT NULL,
  CONSTRAINT `t1_chk_1` CHECK ((`i1` <> 0)),
  CONSTRAINT `t1_chk_2` CHECK ((`i2` > `i1`)),
  CONSTRAINT `t1_chk_3` CHECK ((`i2` <> 0)) /*!80016 NOT ENFORCED */
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci

SHOW CREATE TABLE quotes table and column names according to the value of the sql_quote_show_create option. See Section 5.1.8, “Server System Variables”.

When altering the storage engine of a table, table options that are not applicable to the new storage engine are retained in the table definition to enable reverting the table with its previously defined options to the original storage engine, if necessary. For example, when changing the storage engine from InnoDB to MyISAM, InnoDB-specific options such as ROW_FORMAT=COMPACT are retained.

mysql> CREATE TABLE t1 (c1 INT PRIMARY KEY) ROW_FORMAT=COMPACT ENGINE=InnoDB;
mysql> ALTER TABLE t1 ENGINE=MyISAM;
mysql> SHOW CREATE TABLE t1\G
*************************** 1. row ***************************
       Table: t1
Create Table: CREATE TABLE `t1` (
  `c1` int NOT NULL,
  PRIMARY KEY (`c1`)
) ENGINE=MyISAM DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci ROW_FORMAT=COMPACT

When creating a table with strict mode disabled, the storage engine's default row format is used if the specified row format is not supported. The actual row format of the table is reported in the Row_format column in response to SHOW TABLE STATUS. SHOW CREATE TABLE shows the row format that was specified in the CREATE TABLE statement.

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