sqlserver 创建主键

在新表中创建主键
create table IN_COAST_CMTX(
 CHECK_TYPE            nvarchar(4)
,COMPENSATIONDATE      Date
,AGENTCODE             nvarchar(10)
,AGENCYCODE            nvarchar(10)
,PRODUCTID             nvarchar(255)
CONSTRAINT [PK_IN_COAST_CMTX] PRIMARY KEY CLUSTERED 
(
    COMPENSATIONDATE,
    AGENTCODE,
    PRODUCTID
)WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON)
);
PAD_INDEX :是否聚集索引  STATISTICS_NORECOMPUTE: 是否启用统计信息更新 IGNORE_DUP_KEY: 重复键值，为OFF一旦有重复所有行插入失败，为ON只有重复行插入失败不重复的行会插入
ALLOW_ROW_LOCKS:是否开启行锁  ALLOW_PAGE_LOCKS:是否开启页锁

在现有表上加主键
ALTER TABLE [dbo].[IN_COAST_CMTX] ADD  CONSTRAINT [PK_IN_COAST_CMTX] PRIMARY KEY CLUSTERED 
(
    [COMPENSATIONDATE],
    [AGENTCODE],
    [PRODUCTID]
)WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, SORT_IN_TEMPDB = OFF, IGNORE_DUP_KEY = OFF, ONLINE = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON [PRIMARY]

删除主键
ALTER TABLE IN_COAST_CMTX DROP CONSTRAINT PK_IN_COAST_CMTX;