Sql 拿几个'；用户ID'；s out-WHERE语句并放入变量

我有一个很好的查询

SELECT ui.userID, 
    ui.lockedInd, 
    ui.lockedBy, 
    ui.lockedReason, 
    ui.updatedDtTm,
    ui.updatedBy,
    ua.password,
    ua.updatedDtTm,
    ua.updatedBy 
FROM userInfo ui 
JOIN userAuthentication ua 
    ON ui.userinfoseqid = ua.userinfoseqid
WHERE ui.userID IN (
    'userOne',
    'userTwo'
)

我想将用户名放入顶部声明的变量中。我对如何创建变量和添加变量有点困惑，因为我总是只使用一个值来创建变量。Sudo代码如下

DECLARE @userIDs
SET @userIDs = "'userOne', 'userTwo'"

SELECT ui.userID, 
    ui.lockedInd, 
    ui.lockedBy, 
    ui.lockedReason, 
    ui.updatedDtTm,
    ui.updatedBy,
    ua.password,
    ua.updatedDtTm,
    ua.updatedBy 
FROM userInfo ui 
JOIN userAuthentication ua 
    ON ui.userinfoseqid = ua.userinfoseqid
WHERE ui.userID = @userIDs

---

使用表变量应该适合您

DECLARE @UserIDS TABLE 
(
    UserId VARCHAR(40)
)

INSERT INTO @UserIDS
(
UserId
)
SELECT 'UserOne'
UNION ALL SELECT 'UserTwo'
UNION ALL SELECT 'UserThree'

SELECT ui.userID, 
    ui.lockedInd, 
    ui.lockedBy, 
    ui.lockedReason, 
    ui.updatedDtTm,
    ui.updatedBy,
    ua.password,
    ua.updatedDtTm,
    ua.updatedBy 
FROM userInfo ui 
JOIN userAuthentication ua 
    ON ui.userinfoseqid = ua.userinfoseqid
WHERE ui.userID IN @UserIDS

---

使用表变量应该适合您

DECLARE @UserIDS TABLE 
(
    UserId VARCHAR(40)
)

INSERT INTO @UserIDS
(
UserId
)
SELECT 'UserOne'
UNION ALL SELECT 'UserTwo'
UNION ALL SELECT 'UserThree'

SELECT ui.userID, 
    ui.lockedInd, 
    ui.lockedBy, 
    ui.lockedReason, 
    ui.updatedDtTm,
    ui.updatedBy,
    ua.password,
    ua.updatedDtTm,
    ua.updatedBy 
FROM userInfo ui 
JOIN userAuthentication ua 
    ON ui.userinfoseqid = ua.userinfoseqid
WHERE ui.userID IN @UserIDS

---

您可以使用临时表，有更多信息：

例如，创建一个表变量：

DECLARE @UserIDs TABLE (ID nvarchar(50))
INSERT INTO @UserIDs VALUES ('userOne'), ('userTwo')

SELECT ui.userID
FROM userInfo ui 
JOIN userAuthentication ua 
    ON ui.userinfoseqid = ua.userinfoseqid
WHERE ui.userID IN (SELECT ID FROM @UserIDs)

---

您可以使用临时表，有更多信息：

例如，创建一个表变量：

DECLARE @UserIDs TABLE (ID nvarchar(50))
INSERT INTO @UserIDs VALUES ('userOne'), ('userTwo')

SELECT ui.userID
FROM userInfo ui 
JOIN userAuthentication ua 
    ON ui.userinfoseqid = ua.userinfoseqid
WHERE ui.userID IN (SELECT ID FROM @UserIDs)

---

创建变量的动机是什么？它所属的.sql文件在两个select语句和一个update语句中使用了完全相同的WHERE子句。因此，如果用户ID发生更改，我必须将其更改为3个位置创建变量背后的动机是什么？作为其一部分的.sql文件在两个select语句和一个update语句中使用完全相同的WHERE子句。因此，如果用户ID发生更改，我必须将其更改为3个位置