数据库中已经有一个名为“”的对象

Question

This is my code:

CREATE TABLE supplier  -- creating table supplier
(
  supplierID INT NOT NULL IDENTITY,
  supplierName VARCHAR(30) NOT NULL,
  suppplierNo VARCHAR(10) NOT NULL,
  supplierEmail VARCHAR(30) NOT NULL,
  CONSTRAINT PK_supplierID PRIMARY KEY(supplierID)
)

GO

I get the the error:

Msg 2714, Level 16, State 6, Line 34

There is already an object named 'supplier' in the database.

Any help? Thanks!

Answer 1

Please try this code.

IF EXISTS(SELECT 1 FROM sys.tables WHERE name = 'supplier') 

DROP TABLE dbo.supplier;
CREATE TABLE dbo.supplier
(
    supplierID INT NOT NULL IDENTITY,
    supplierName VARCHAR(30) NOT NULL,
    suppplierNo VARCHAR(10) NOT NULL,
    supplierEmail VARCHAR(30) NOT NULL,
    CONSTRAINT PK_supplierID PRIMARY KEY(supplierID)
)
GO

Answer 2

You need to check if the table exists first

IF OBJECT_ID('dbo.supplier', 'U') IS NOT NULL 
  DROP TABLE dbo.supplier;
CREATE TABLE dbo.supplier
(
    supplierID INT NOT NULL IDENTITY,
    supplierName VARCHAR(30) NOT NULL,
    suppplierNo VARCHAR(10) NOT NULL,
    supplierEmail VARCHAR(30) NOT NULL,
    CONSTRAINT PK_supplierID PRIMARY KEY(supplierID)
)
GO

If you are using 2016+ you can use

DROP TABLE IF EXISTS dbo.supplier;
CREATE TABLE dbo.supplier
(
    supplierID INT NOT NULL IDENTITY,
    supplierName VARCHAR(30) NOT NULL,
    suppplierNo VARCHAR(10) NOT NULL,
    supplierEmail VARCHAR(30) NOT NULL,
    CONSTRAINT PK_supplierID PRIMARY KEY(supplierID)
)
GO