在MySQL数据库中，关于表的克隆有多种方式，比如我们可以使用create table ..as .. ，也可以使用create...
AlterDatabaseStatement AlterDatabaseTermination AlterEndpointStatement AlterEventSessionStatement AlterEventSessionStatementType AlterExternalDataSourceStatement AlterExternalLanguageStatement AlterExternalLibraryStatement AlterExternalResourcePoolStatement AlterFederationKind AlterFederationStatement AlterFullText...
IF EXISTS (SELECT * FROM sys.server_triggers WHERE name = 'ddl_trig_database') DROP TRIGGER ddl_trig_database ON ALL SERVER; GO CREATE TRIGGER ddl_trig_database ON ALL SERVER FOR CREATE_DATABASE AS PRINT 'Database Created.' SELECT EVENTDATA().value('(/EVENT_INSTANCE/TSQLCommand/CommandT...
an application calledordersmight use procedures namedorderproc;1,orderproc;2, and so on. The DROP PROCEDUREorderprocstatement drops the whole group. If the name contains delimited identifiers, the number should
1 CREATE DATABASE 句法 2 3 CREATE DATABASE [IF NOT EXISTS] db_name 4 5 CREATE DATABASE 以给定名字创建一个数据库。允许的数据库名规则在章节 6.1.2 数据库、表、索引、列和别名 中被给出。 如果数据库已经存在,并且你...
No. If you want to modify this property, create another table. event_time_column The event time column of the table. By default, the first non-null timestamp column is used as the event time column. Not supported. By default, the first non-null timestamp column is used as the ...
OR ALTERApplies to: Azure SQL Database, SQL Server (starting with SQL Server 2016 (13.x) SP1).Alters the procedure if it already exists.schema_nameThe name of the schema to which the procedure belongs. Procedures are schema-bound. If a schema name isn't specified when the procedure is ...
推荐优先使用CREATE TABLE WITH语法,针对特定场景,如频繁创建已存在的表(CREATE TABLE IF NOT EXISTS)并设置表属性时,可以显著提升DDL性能。 V2.1版本起支持的语法: BEGIN;CREATETABLE[ IFNOTEXISTS] [schema_name.] table_name ([ { column_name column_type [column_constraints, [...]]|table_constraints ...
DML_event_clause::= Description of the illustration DML_event_clause.gif referencing_clause::= Description of the illustration referencing_clause.gif Semantics OR REPLACE SpecifyORREPLACEto re-create the trigger if it already exists. Use this clause to change the definition of an existing trigger ...
CREATE [TEMPORARY] TABLE [IF NOT EXISTS] tbl_name (create_definition,...) [table_options] [partition_options] CREATE [TEMPORARY] TABLE [IF NOT EXISTS] tbl_name [(create_definition,...)] [table_options] [partition_options] [IGNORE | REPLACE] [AS] query_expression CREATE [TEMPORARY] ...