用于在sql中查找所有全零值的列的查询是什么？

Question

用于在sql中查找所有全零值的列的查询是什么？

Answer 1

下面的代码片断将创建存储过程，它扫描所有表并在每个字段中查找搜索项。

CREATE PROC [dbo].[SearchAllTables] 
(
    @SearchStr nvarchar(100) 
) 
AS 
BEGIN 

    CREATE TABLE #Results (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 ''' + @TableName + '.' + @ColumnName + ''', LEFT(' + @ColumnName + ', 3630) 
        FROM ' + @TableName + ' (NOLOCK) ' + 
        ' WHERE ' + @ColumnName + ' LIKE ' + @SearchStr2 
       ) 
      END 
     END 
    END 

    SELECT ColumnName, ColumnValue FROM #Results 
END 


exec dbo.SearchAllTables '0' 

参考链接：HERE