Question

我是SQL新手。我正在使用SQL Server 2008。我想在最近1分钟内从表中添加记录。实际上我每隔1分60秒就会调用一次SP，并且我没有任何保存修改日期的列，所以我必须选择在时间间隔内添加的所有行。

可能不会在最后一分钟内添加任何行或添加N行，因此我需要在1分钟的计时器间隔内添加所有行，因为SP将在每1分钟后被触发。

Answer 1

要获取最后一分钟插入的表中的所有记录，您需要在表上具有DEFAULT GETDATE（）约束的日期字段，或者在插入记录时手动插入日期。 / p>

SELECT *
FROM MyTable
WHERE MyDateColumn >= DATEADD(mi, -1, GETDATE())

在现有表格上创建一个默认列：

ALTER TABLE MyTable
ADD MyDateColumn DATETIME2 NOT NULL DEFAULT GETDATE()

您可以从sys或INFORMATION_SCHEMA模式中获取表/行元数据，但我真的不推荐它。

说，也许您的应用程序/数据库适合SQL Server审核？

http://technet.microsoft.com/en-us/library/cc280386.aspx

<强>更新

这并不能完全回答您的问题，但它可能是一个可行的解决方案。我写了一个游标来创建并将审计触发器应用于数据库中的所有表。设置触发器以记录到单独的表（当前是硬编码的）。您可以根据需要对其进行修改，但我已在下面提供了所有相关代码。我想你需要删除UserId及其约束：

-- Stores the types of audit entries for the "Logs" table, such as "RECORD CREATED", "RECORD MODIFIED", "RECORD DELETED" and other, miscellaneous log types
CREATE TABLE dbo.LogTypes (
    LogTypeID                   INT             NOT NULL    IDENTITY    PRIMARY KEY,
    [Description]               VARCHAR(100)    NOT NULL    UNIQUE
)

CREATE TABLE dbo.[Logs] (
    LogID                       INT             NOT NULL    IDENTITY    PRIMARY KEY,
    LogTypeID                   INT             NOT NULL    FOREIGN KEY REFERENCES LogTypes(LogTypeID),
    UserID                      INT             NOT NULL    FOREIGN KEY REFERENCES Users(UserID), -- User that created this log entry.
    SysObjectID                 INT, -- The ID of the table in sysobjects (if this is a CRUD insert from a trigger)
    Details                     VARCHAR(1000),
    DateCreated                 DATETIME        NOT NULL    DEFAULT GETDATE()
)

-----------------------------------------------------------------------------
-- Log types
-----------------------------------------------------------------------------
SET IDENTITY_INSERT LogTypes ON

INSERT INTO LogTypes (LogTypeID, [Description])
VALUES(1, 'Record Insert')
INSERT INTO LogTypes (LogTypeID, [Description])
VALUES(2, 'Record Update')
INSERT INTO LogTypes (LogTypeID, [Description])
VALUES(3, 'Record Deletion')
INSERT INTO LogTypes (LogTypeID, [Description])
VALUES(4, 'User logged in')
INSERT INTO LogTypes (LogTypeID, [Description])
VALUES(5, 'User logged out')

SET IDENTITY_INSERT LogTypes OFF

光标代码（运行一次）：

DECLARE @table_name VARCHAR(500), @instruction VARCHAR(MAX)

DECLARE curTables CURSOR READ_ONLY FAST_FORWARD FOR
 SELECT TABLE_NAME
 FROM INFORMATION_SCHEMA.TABLES
 WHERE TABLE_NAME <> 'Logs'

OPEN curTables

FETCH NEXT FROM curTables INTO @table_name

WHILE @@FETCH_STATUS = 0
    BEGIN

        -- Drop any existing trigger
        SET @instruction = 'IF OBJECT_ID (''tr_' + @table_name + '_Audit'',''TR'') IS NOT NULL DROP TRIGGER tr_' + @table_name + '_Audit;'
        exec sp_sqlexec @instruction

        -- Create the new trigger
        SET @instruction = 'CREATE TRIGGER tr_' + @table_name + '_Audit
        ON ' + @table_name + '
            AFTER INSERT, UPDATE, DELETE 
        AS
            SET NOCOUNT ON

            DECLARE @LogTypeID INT, @SystemUserID INT, @SysObjectID INT, @TableName VARCHAR(500)

            SET @SystemUserID   = 1 -- System account
            SET @TableName      = ''' + @table_name + '''

            IF EXISTS(SELECT * FROM Inserted) AND EXISTS(SELECT * FROM Deleted)
                SET @LogTypeID = 2 -- Update
            ELSE IF EXISTS(SELECT * FROM Inserted)
                SET @LogTypeID = 1 -- Insertion
            ELSE IF EXISTS(SELECT * FROM Deleted)
                SET @LogTypeID = 3 -- Deletion

            SET @LogTypeID = ISNULL(@LogTypeID, 0)

            IF @LogTypeID > 0
                BEGIN
                    -- Only log if successful
                    SELECT
                        @SysObjectID = id
                    FROM sysobjects (nolock)
                    where [name]    = @TableName
                    AND [type]      = ''U''

                    INSERT INTO [Logs] (LogTypeID, UserID, SysObjectID, Details, DateCreated)
                    VALUES(@LogTypeID, @SystemUserID, @SysObjectID, NULL, GETDATE())
                END'
        exec sp_sqlexec @instruction

        FETCH NEXT FROM curTables INTO @table_name
    END

CLOSE curTables
DEALLOCATE curTables

数据库中的每个表现在都将所有INSERT，UPDATE和DELETE记录到Log表中。但是，请注意，向表中添加触发器会增加I / O和内存使用量，从而降低性能。不过，对你来说这可能不是一个大问题。

如何获得最后一分钟添加的所有记录

1 个答案: