Question

可能重复：
SQL Server: Check if table exists

我正在使用Java和MS SQL Server 2008，我想在检查数据库中是否存在表之后才创建表。

 public void addTestTable(){
  jdbcTemplate.execute(
            "create table [mydatabase].[dbo].[test] (ID integer not null identity, CREATEDBY varchar(50), CREATEDAT datetime, TITLE varchar(50), NRQUEST int, FORGROUP int, primary key(id))"

            );

}

这是我的createTable函数，我需要另一个布尔函数来检查表是否已经存在，但我不知道如何为它编写sql语句。有人可以帮帮我吗？

Answer 1

IF OBJECT_ID('tablename','U') is not null
-- table exists

或

SELECT *
   FROM sys.tables
   WHERE name = 'mytable'
   AND schema_id = SCHEMA_ID('myschema')

Answer 2

IF NOT EXISTS (SELECT * 
                 FROM INFORMATION_SCHEMA.TABLES 
                 WHERE TABLE_SCHEMA = 'testSchema' 
                 AND  TABLE_NAME = 'testTable')
BEGIN
    --create table
END

Answer 3


if not exists(select 1 from sys.tables where name ='test' and schema_id = SCHEMA_ID('dbo'))
begin
  create table [dbo].[test] (ID integer not null identity, CREATEDBY varchar(50), 
  CREATEDAT datetime, TITLE varchar(50), NRQUEST int, FORGROUP int, primary key(id)) 
  print 'table created'
end
go

检查表是否存在sql server

3 个答案: