SELECT WHERE中的条件NOT IN子句

SQL Server 2008 R2的存储过程中是否有可能为SELECT语句的WHERE有条件NOT IN子句？我有三个表，Employee，TestingA和TestingB，其中employeeID是TestingA外键和TestingB：SELECT WHERE中的条件NOT IN子句

CREATE TABLE [dbo].[Employee](
    [employeeID] [int] IDENTITY(9500,1) NOT NULL, 
    [firstName] [nvarchar](50) NOT NULL, 
    [middleName] [nvarchar](50) NULL, 
    [lastName] [nvarchar](50) NOT NULL, 
    [suffix] [nvarchar](50) NULL, 
    [createdDate] [datetime] NOT NULL CONSTRAINT [DF_Employee_createdDate] DEFAULT (getdate()), 
CONSTRAINT [PK_Person] PRIMARY KEY CLUSTERED 
(
    [employeeID] ASC 
)WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON [PRIMARY] 
) ON [PRIMARY] 

CREATE TABLE [dbo].[TestingA](
    [testingA_ID] [int] IDENTITY(1,1) NOT NULL, 
    [employeeID] [int] NOT NULL, 
    [isComplete] [bit] NULL CONSTRAINT [DF_TestingA_isComplete] DEFAULT ((0)), 
    [createdDate] [datetime] NOT NULL CONSTRAINT [DF_TestingA_createdDate] DEFAULT (getdate()), 
CONSTRAINT [PK_TestingA] PRIMARY KEY CLUSTERED 
(
    [testingA_ID] ASC 
)WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON [PRIMARY] 
) ON [PRIMARY] 

CREATE TABLE [dbo].[TestingB](
    [testingB_ID] [int] IDENTITY(1,1) NOT NULL, 
    [employeeID] [int] NOT NULL, 
    [isComplete] [bit] NULL CONSTRAINT [DF_TestingB_isComplete] DEFAULT ((0)), 
    [createdDate] [datetime] NOT NULL CONSTRAINT [DF_TestingB_createdDate] DEFAULT (getdate()), 
CONSTRAINT [PK_TestingB] PRIMARY KEY CLUSTERED 
(
    [testingB_ID] ASC 
)WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON [PRIMARY] 
) ON [PRIMARY]

我需要做SELECT在Employee表基础上为它WHERE子句条件NOT IN存储过程的输入参数：

@Type nvarchar(50)

基于对@Type的价值，我希望做一个NOT IN在TestingA或TestingB。所以它是这样的：

select e.employeeId from Employee e 
    where 
     -- If @Type = 'TestingA' Then 
     -- e.employeeID NOT IN (select ta.employeeID from TestingA ta) 
     -- End 
     -- Else    
     -- e.employeeID NOT IN (select tb.employeeID from TestingB ta) 
     -- End

我该如何在Transact-SQL中做到这一点？谢谢。

来源

2016-07-05 Alex

http：// stackoverf low.com/questions/337704/parameterize-an-sql-in-clause – Ako

select e.employeeId 
from Employee e 
where @Type = 'TestingA' 
    AND not exists(select 1 from TestingA ta where ta.employeeID=e.employeeID) 
    OR @Type != 'TestingA' 
    AND not exists(select 1 from TestingB tb where tb.employeeID=e.employeeID)

来源

2016-07-05 14:31:07

谢谢，@IvanStarostin。 'select 1'是做什么的？ – Alex

“存在”中忽略选定的列表。有些人甚至喜欢在那里放置“1/0”。 –

This Works，@IvanStarostin。谢谢！后续：“NOT IN”和“NOT EXISTS”有什么区别？ – Alex

因为它是一个存储过程，我会做两个语句（这可能会提高性能）

IF @Type = 'TestingA' Then 
    select e.employeeId from Employee e 
     where e.employeeID NOT IN (select ta.employeeID from TestingA ta) 
else 
    select e.employeeId from Employee e 
     where e.employeeID NOT IN (select ta.employeeID from TestingB ta)

来源

2016-07-05 14:30:59 vercelli

使用此

select e.employeeId from Employee e 
where 
    e.employeeID NOT IN (case when @Type = 'TestingA' Then 
     (select ta.employeeID from TestingA ta) 
    Else    
    (select tb.employeeID from TestingB tb) 
    End)

可以使用也加入了同查询如下

select e.employeeId from Employee e 
left join TestingA e1 on @Type='TestingA' and e.employeeId != e1.employeeID 
left join TestingB e2 on @Type!='TestingA' and e.employeeId != e2.employeeID

来源

2016-07-05 14:48:15

SELECT WHERE中的条件NOT IN子句

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