Question

我想根据列名，类型等查询一组表。基本上我不知道表的名称，我想查询数据库中所有能够存储数据的表。

我有这个查询，但我不确定它是否非常有效。我想知道是否有更好的方法。

 SELECT O.TABLE_NAME FROM INFORMATION_SCHEMA.COLUMNS AS O
    INNER JOIN INFORMATION_SCHEMA.COLUMNS AS R1
        ON R1.TABLE_NAME = O.TABLE_NAME and R1.COLUMN_NAME = 'Id' and R1.DATA_TYPE = 'uniqueidentifier'
    INNER JOIN INFORMATION_SCHEMA.COLUMNS as R2
        ON R2.TABLE_NAME = O.TABLE_NAME and R2.COLUMN_NAME = 'Message' and R2.DATA_TYPE = 'nvarchar'
    INNER JOIN INFORMATION_SCHEMA.COLUMNS AS R3
        ON R3.TABLE_NAME = O.TABLE_NAME and R3.COLUMN_NAME = 'EnteredOn' and R3.DATA_TYPE = 'datetime'
    GROUP BY O.TABLE_NAME

此查询目前有效，但我觉得必须有更好的方法。基本上我不希望其他表显示可能有一个名为Id但不包含Message和EnteredOn列的列。

这是表的CREATE TABLE查询。

CREATE TABLE [dbo].[Log](
    [Id] [uniqueidentifier] ROWGUIDCOL  NOT NULL,
    [Message] [nvarchar](2048) NULL,
    [EnteredOn] [datetime] NOT NULL,
 CONSTRAINT [PK_Log] PRIMARY KEY CLUSTERED 
(
    [Id] ASC
)WITH (PAD_INDEX  = OFF, STATISTICS_NORECOMPUTE  = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS  = ON, ALLOW_PAGE_LOCKS  = ON) ON [PRIMARY]
) ON [PRIMARY]

Answer 1

SELECT table_schema, table_name
FROM   information_schema.columns
WHERE  COLUMN_NAME = 'Id'        AND DATA_TYPE = 'uniqueidentifier'
OR     COLUMN_NAME = 'Message'   AND DATA_TYPE = 'nvarchar'
OR     COLUMN_NAME = 'EnteredOn' AND DATA_TYPE = 'datetime'
GROUP BY table_schema, table_name
HAVING COUNT(COLUMN_NAME) = 3

根据列信息查询表名

1 个答案: