Question

我有一个约有420个表的数据库。所有表都有“审核”列：field1，field2，field3。

如何编写查询来检查整个数据库中任何这些审计列中是否有NULL值？

Answer 1

下面应该为您做个窍门，如果需要其他输出，请尝试一下。

CREATE TABLE #Results (ColumnName nvarchar(370), ColumnValue nvarchar(3630))

SET NOCOUNT ON

DECLARE @TableName nvarchar(256) = ''
DECLARE @ColumnName nvarchar(100)

WHILE @TableName IS NOT NULL
BEGIN
    SET @ColumnName = ''

    -- check tables
    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

    )

    -- check if above table has columns we want to check
    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 COLUMN_NAME IN ('field1', 'field2', 'field3')
                AND QUOTENAME(COLUMN_NAME) > @ColumnName
        )

        -- insert into temp table if column value is null
        IF @ColumnName IS NOT NULL
            INSERT INTO #Results EXEC('SELECT DISTINCT ''' + @TableName + '.' + @ColumnName + ''', LEFT(' + @ColumnName + ', 3630) FROM ' + @TableName + ' (NOLOCK) ' +' WHERE ' + @ColumnName + ' IS NULL ')
    END   
END

 -- return results
SELECT ColumnName, ColumnValue FROM #Results

-- drop temp table
DROP TABLE #Results

SQL Server：在整个数据库中搜索具有NULL值的所有列

1 个答案: