我在解决这个问题上遇到了困难。我正在使用Microsoft SQL Server 2014（版本12.0.4100.1）。
我有两张表contacts和business。我有一系列联系人用户名。我正在使用WHERE中的子查询从此用户名数组中获取业务列表，如下所示：
SELECT business.id, business.name, business.notes
FROM business
WHERE business.id IN (SELECT contacts.business_id
FROM contacts
WHERE contacts.username IN ('username1', 'username2', 'username3'))
此查询工作正常，但我无法弄清楚如何选择找到每一行的值;例如：如果我从用户名'username1'的联系人处获取业务，我想获取它并查看结果：
business.id = 1
business.name = 'Business 1'
business.notes = 'Notes from business 1.'
contacts.username = 'username1'
得到这个结果，我可以很容易地看到每个企业的联系方式。
提前谢谢！
编辑：每个企业可能有多个联系人，因此执行INNER JOIN会为每个联系人返回重复的业务结果。我想确切地知道在子查询中选择的那个是什么联系人。
答案 0 :(得分：3)
我认为您正在寻找DECLARE @SearchStr nvarchar(100)
SET @SearchStr = '%test%'
DECLARE @Results TABLE( TableName nvarchar(256), ColumnName nvarchar(370), ColumnValue nvarchar(3630))
SET NOCOUNT ON
DECLARE @TableName nvarchar(256), @ColumnName nvarchar(128), @SearchStr2 nvarchar(110)
SET @TableName = ''
SET @SearchStr2 = QUOTENAME('%' + @SearchStr + '%','''')
WHILE @TableName IS NOT NULL
BEGIN
SET @ColumnName = ''
SET @TableName =
(
SELECT MIN(QUOTENAME(TABLE_SCHEMA) + '.' + QUOTENAME(TABLE_NAME))
FROM INFORMATION_SCHEMA.TABLES
WHERE TABLE_TYPE = 'BASE TABLE'
AND QUOTENAME(TABLE_SCHEMA) + '.' + QUOTENAME(TABLE_NAME) > @TableName
AND OBJECTPROPERTY(
OBJECT_ID(
QUOTENAME(TABLE_SCHEMA) + '.' + QUOTENAME(TABLE_NAME)
), 'IsMSShipped'
) = 0
)
WHILE (@TableName IS NOT NULL) AND (@ColumnName IS NOT NULL)
BEGIN
SET @ColumnName =
(
SELECT MIN(QUOTENAME(COLUMN_NAME))
FROM INFORMATION_SCHEMA.COLUMNS
WHERE TABLE_SCHEMA = PARSENAME(@TableName, 2)
AND TABLE_NAME = PARSENAME(@TableName, 1)
AND DATA_TYPE IN ('char', 'varchar', 'nchar', 'nvarchar')
AND QUOTENAME(COLUMN_NAME) > @ColumnName
)
IF @ColumnName IS NOT NULL
BEGIN
INSERT INTO @Results
EXEC
(
'SELECT DISTINCT ''' + @TableName + ''',''' + @ColumnName + ''', LEFT(' + @ColumnName + ', 3630)
FROM ' + @TableName + ' (NOLOCK) ' +
' WHERE ' + @ColumnName + ' LIKE ' + @SearchStr2
)
END
END
END
SELECT TableName, ColumnName, ColumnValue
FROM @Results
：
join