Help Center/ GaussDB(DWS)/ Tool Guide/ DSC/ SQL Syntax Migration Reference/ MySQL Syntax Migrating/ Schema Objects and Data Definition Language (DDL)/ Table (Optional Parameters and Operations)/ LIKE (Table Cloning)
Updated on 2024-07-19 GMT+08:00
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LIKE (Table Cloning)

MySQL databases support CREATE TABLE. LIKE is a method with which a table is created by cloning the old table structure, It is also supported by GaussDB(DWS). DSC will add additional table attribute information during migration.

Input

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CREATE TABLE IF NOT EXISTS `public`.`runoob_tbl_old`(
    `dataType_1` YEAR,
    `dataType_2` YEAR(4),
    `dataType_3` YEAR DEFAULT '2018',
    `dataType_4` TIME DEFAULT NULL
);

CREATE TABLE `runoob_tbl` (like `runoob_tbl_old`);

Output

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CREATE TABLE IF NOT EXISTS "public"."runoob_tbl_old"
(
  "datatype_1" SMALLINT,
  "datatype_2" SMALLINT,
  "datatype_3" SMALLINT DEFAULT '2018',
  "datatype_4" TIME WITHOUT TIME ZONE DEFAULT NULL
)
  WITH ( ORIENTATION = ROW, COMPRESSION = NO )
  NOCOMPRESS
  DISTRIBUTE BY HASH ("datatype_1");

CREATE TABLE "public"."runoob_tbl"( LIKE "public"."runoob_tbl_old"
   INCLUDING COMMENTS INCLUDING CONSTRAINTS INCLUDING DEFAULTS INCLUDING INDEXES INCLUDING STORAGE);