2

我正在使用以下 SQL 列出我的架构中的所有表和列名称，这些表包含名称包含字符串“code”的表，使用以下 SQL 服务器查询：

SELECT 
    a.table_name, a.column_name from (SELECT t.name AS table_name,
    SCHEMA_NAME(schema_id) AS schema_name,
    c.name AS column_name
FROM 
    sys.tables AS t
INNER JOIN 
    sys.columns c ON t.OBJECT_ID = c.OBJECT_ID
WHERE 
    c.name LIKE '%code%') a

结果：

Table Name     Column Name
----------     -----------
Tab_1_name     a_code
Tab_2_name     another_code
Tab_3_name     yet_another_code
and so on...

我现在想使用包装器查询 a_code 和 another_code 列中的实际数据，但看不到如何获取实际数据（例如，如果单独为 Tab 1 进行操作，我会

SELECT a_code FROM Tab_1

要得到

a_code
------
value 1
value 2
value 3

但无法弄清楚或在任何地方找到如何编码外部查询以环绕上述内容，这样我就会得到以下内容：

Tab1_name  a_code
---------  ------
tab_name 1 value 1
tab_name 1 value 2
tab_name 2 value 1
tab_name 2 value 2
tab_name 3 value 1
tab_name 3 value 2 ... etc.

即我的模式/数据库中所有表列中所有数据值的格式化列表，其名称包含“代码”一词？

4

2 回答 2

2

如果没有动态 SQL，无论如何都无法做到这一点。

这里有一些东西可以帮助您入门。

DECLARE @SearchTerm NVARCHAR(50)

SELECT @SearchTerm = '%id%'

SELECT  t.name AS table_name,
        SCHEMA_NAME(schema_id) AS schema_name,
        c.name AS column_name
INTO #temp
FROM sys.tables AS t
INNER JOIN sys.columns c ON t.OBJECT_ID = c.OBJECT_ID
WHERE c.name LIKE @SearchTerm
ORDER BY t.name

DECLARE @Query      NVARCHAR(MAX),
        @tableName  NVARCHAR(250),
        @schemaName NVARCHAR(10),
        @columnName NVARCHAR(250)


SELECT @Query = 'SELECT SchemaName = '''',
                        TableName = '''',
                        ColumnName = '''',
                        Value = CONVERT(NVARCHAR(MAX), '''')
                 WHERE 0 = 1'

WHILE(EXISTS(SELECT TOP 1 1 FROM #temp))
BEGIN

    SELECT TOP 1    @tableName = table_name,
                    @schemaName = [schema_name],
                    @columnName = column_name
    FROM #temp

    SELECT @Query = @Query + ' UNION ALL SELECT SchemaName = ''' + @schemaName + ''',
                                                TableName = ''' + @tableName + ''',
                                                ColumnName = ''' + @columnName + ''',
                                                Value = CASE WHEN ' + @columnName + ' IS  NULL THEN ''NULL'' ELSE CONVERT(NVARCHAR(MAX), ' + @columnName + ') END
                                         FROM ' + @tableName

    DELETE #temp
    WHERE table_name = @tableName
    AND @schemaName = [schema_name]
    AND @columnName = column_name

END

PRINT @Query

EXEC  sp_executesql @Query

DROP TABLE #temp

上述查询返回以下信息： SchemaName TableName ColumnName Value

请注意，通过返回所有匹配列的值，您很可能会遇到转换问题和空转换问题。在上面的查询中，处理了基本情况，但转换为“NVARCHAR”可能仍会因某些复杂的 SQL 列类型而失败。

于 2016-03-11T17:37:00.047 回答
0 
use master
GO
declare
  @sql varchar(max) = '',
  @colpattern varchar(100) = '%name%'

;with cteSchema as
(
  select
    object_schema_name(t.object_id) + '.' + quotename(t.name) as tabname,
    quotename(c.name) as colname
  from sys.tables t
  inner join sys.columns c on c.object_id = t.object_id
  where c.name like @colpattern
)
select @sql = 
  (
    select
        cast('
        select cast(t.' as varchar(max)) + t.colname + ' as varchar(1000)) as [value] '
        + ', cast(''' + t.tabname + '.' + t.colname + ''' as nvarchar(2000)) as [source] '
        + ' from ' + t.tabname + ' t
        union all '
    from cteSchema t
    order by t.tabname, t.colname
    for xml path(''), type
  ).value('.', 'varchar(max)') 
  + ' 
  select null, null where 1=0
  order by [source], [value]'

print @sql

exec (@sql)
GO
于 2016-03-11T19:33:13.423 回答