SQL Server：错误创建具有多个主键的表

Question

Query is as follows:

create TABLE tbl_temp (
[ref] numeric(18), 
[item_code] varchar(50), 
[item_desc] nvarchar(150),
[Qty] smallint) PRIMARY KEY (ref, item_code))

Returning error:

Msg 156, Level 15, State 1, Line 1 Incorrect syntax near the keyword 'PRIMARY'.

Answer 1

Try this way:

create TABLE tbl_temp 
(
   [ ref] numeric(18), 
   [item_code] varchar(50), 
   [item_desc] nvarchar(150),
   [Qty] smallint,
   PRIMARY KEY (ref, item_code)
) 

But better way to do that is to use constraint as below:

create TABLE tbl_temp 
(
   [ ref] numeric(18), 
   [item_code] varchar(50), 
   [item_desc] nvarchar(150),
   [Qty] smallint,
   CONSTRAINT pk_tbl_temp  PRIMARY KEY (ref, item_code)
) 

or

create TABLE tbl_temp 
(
   [ ref] numeric(18), 
   [item_code] varchar(50), 
   [item_desc] nvarchar(150),
   [Qty] smallint
) 

ALTER TABLE tbl_temp 
 ADD CONSTRAINT pk_tbl_temp  PRIMARY KEY (ref, item_code)

Is better way because you set a friendly name for your PK.

Answer 2

Rather try

create TABLE tbl_temp
([ref] numeric(18), 
 [item_code] varchar(50),
 [item_desc] nvarchar(150),
 [Qty] smallint,
PRIMARY KEY (ref, item_code)
 )

Have a look at this example

SQL Fiddle DEMO