SELECT name FROM sys.databases WHERE name = N'TutorialDB' ) CREATE DATABASE [TutorialDB] GO USE [TutorialDB] -- Create a new table called 'Customers' in schema 'dbo' -- Drop the table if it already exists IF OBJECT_ID('dbo.Customers', 'U') IS NOT NULL DROP TABLE dbo.Customers G...
"createdatabaseifnotexists"命令就是一个便捷的方法来自动检查和创建数据库。 下面将详细介绍如何使用"createdatabaseifnotexists"来创建数据库。 第一步:打开数据库管理系统 首先,需要打开数据库管理系统,这可以是任何支持SQL的软件,如MySQL、SQL Server、Oracle等。在打开的数据库管理系统中,可以通过命令行或可视化...
database_name can be a maximum of 128 characters, unless a logical name is not specified for the log file. If a logical log file name is not specified, SQL Server generates the logical_file_name and the os_file_name for the log by appending a suffix to database_name. This limits dat...
U-SQL 复制 DECLARE @ASSEMBLY_PATH string = "/upload/asm/spatial/"; DECLARE @SPATIAL_ASM string = @ASSEMBLY_PATH+"Microsoft.SqlServer.Types.dll"; DECLARE @SPATIAL_NATIVEDLL string = @ASSEMBLY_PATH+"SqlServerSpatial130.dll"; CREATE DATABASE IF NOT EXISTS SQLSpatial; USE DATABASE SQLSpatial;...
If not specified, the database is assigned the default collation of the instance of SQL Server. A collation name cannot be specified on a database snapshot. A collation name cannot be specified with the FOR ATTACH or FOR ATTACH_REBUILD_LOG clauses. For in...
database_namecan be a maximum of 128 characters, unless a logical name is not specified for the log file. If a logical log file name is not specified, SQL Server generates thelogical_file_nameand theos_file_namefor the log by appending a suffix todatabase_name. This limitsdatabase_name...
SQL DUMP: CREATE DATABASE IF NOT EXISTS `clearwater` /*!40100 DEFAULT CHARACTER SET utf8mb4 COLLATE utf8mb4_0900_ai_ci */ /*!80016 DEFAULT ENCRYPTION='N' */; USE `clearwater`; -- MySQL dump 10.13 Distrib 8.0.21, for Win64 (x86_6...
When calling CREATE DATABASE IF NOT EXISTS abc statement directly against MariaDB server and database already exists it correctly signals it via note: Note (Code 1007): Can't create database 'abc'; database exists: $ mysql -h 127.0.0.1 -...
IFNOTEXISTS(SELECT*FROMsys.databasesWHEREname='ChuckTest')CREATEDATABASEChuckTestONPRIMARY( NAME=N'ChuckTest_Data', FILENAME=N'D:\MSSQL\SQL2014\DATA\ChuckTest_Data.mdf', SIZE=167872KB, MAXSIZE=UNLIMITED, FILEGROWTH=16384KB )LOGON(
MySQL は、さまざまなCREATE ... IF NOT EXISTSステートメントが複製されるときにこれらの値を適用します。 データベースがソースにすでに存在するかどうかにかかわらず、すべてのCREATE DATABASE IF NOT EXISTSステートメントがレプリケートされます。