create database语句是在MySQL实例上创建一个指定名的数据库,create schema语句的语义和create database是一样的。先来看下create的语法: Syntax:CREATE{DATABASE|SCHEMA} [IFNOTEXISTS] db_name [create_specification] ... create_specification: [DEFAULT]CHARACTERSET[=] charset_name|[DEFAULT]COLLATE[=] collati...
1>.CREATE DATABASE 语句是在MySQL实力上创建一个指定名称的数据库,CREATE SCHEMA语句的语意和CREATE DATABASE是一样的。 mysql>?CREATEDATABASEName:'CREATE DATABASE'Description: Syntax:CREATE{DATABASE|SCHEMA}[IF NOT EXISTS]db_name[create_specification]... create_specification:[DEFAULT]CHARACTERSET[=]chars...
SyntaxCREATE DATABASE databasename; CREATE DATABASE ExampleThe following SQL statement creates a database called "testDB":ExampleGet your own SQL Server CREATE DATABASE testDB; Tip: Make sure you have admin privilege before creating any database. Once a database is created, you can check it...
syntaxsql CREATEDATABASEdatabase_name[CONTAINMENT= {NONE|PARTIAL} ] [ON[PRIMARY]<filespec>[ ,...n ] [ ,<filegroup>[ ,...n ] ] [LOGON<filespec>[ ,...n ] ] ] [COLLATEcollation_name] [WITH<option>[,...n ] ] [;]<option>::={FILESTREAM(<filestream_option>[,...n ] ) |DEFA...
syntaxsql CREATEDATABASEdatabase_name[CONTAINMENT= {NONE|PARTIAL} ] [ON[PRIMARY]<filespec>[ ,...n ] [ ,<filegroup>[ ,...n ] ] [LOGON<filespec>[ ,...n ] ] ] [COLLATEcollation_name] [WITH<option>[,...n ] ] [;]<option>::={FILESTREAM(<filestream_option>[,...n ] ) |DEFA...
syntaxsql CREATEDATABASEdatabase_name[CONTAINMENT= {NONE|PARTIAL} ] [ON[PRIMARY]<filespec>[ ,...n ] [ ,<filegroup>[ ,...n ] ] [LOGON<filespec>[ ,...n ] ] ] [COLLATEcollation_name] [WITH<option>[,...n ] ] [;]<option>::={FILESTREAM(<filestream_option>[,...n ] ) |DEFA...
syntaxsql 复制 CREATE DATABASE database_snapshot_name ON ( NAME = logical_file_name, FILENAME = 'os_file_name' ) [ ,...n ] AS SNAPSHOT OF [;] 参数 database_name 这是新数据库的名称。 数据库名称在 SQL Server 的实例中必须是唯一的,并且必须符合标识符规则。 除非没有为日志文件指定...
The length of a table name depends on the database you’re using: Oracle (before v12.2): 30 characters Oracle (after v12.2): 128 characters SQL Server: 128 characters MySQL: 64 characters PostgreSQL: 63 characters Create Table Primary Key Syntax ...
UPDATE - updates data in a database DELETE - deletes data from a database INSERT INTO - inserts new data into a database CREATE DATABASE - creates a new database ALTER DATABASE - modifies a database CREATE TABLE - creates a new table ALTER TABLE - modifies a table DROP TABLE - delet...
CREATE DATABASE- 创建新数据库 ALTER DATABASE- 修改数据库 CREATE TABLE- 创建新表 ALTER TABLE- 变更(改变)数据库表 DROP TABLE- 删除表 CREATE INDEX- 创建索引(搜索键) DROP INDEX- 删除索引 (2)数据操纵(SQL DML)数据操纵分成数据查询和数据更新两类。数据更新又分成插入、删除、和修改三种操作。