我的任务是创建一个通用触发器(一个触发器将对数据库中的所有表起作用),该触发器将在插入,删除和更新时触发以捕获对表所做的更改。
我有2个新表,一个主表...
CREATE TABLE [dbo].[DATA_HIL_Master](
[MasterId] [int] IDENTITY(1,1) NOT NULL,
[ReferenceTable] [nvarchar](100) NULL,
[ReferenceId] [int] NULL,
[OperationType] [smallint] NULL,
[Last_UserId_Log] [int] NULL,
[Last_WorkstationId_Log] [int] NULL,
[Last_DateTime_Log] [datetime] NULL, PRIMARY KEY CLUSTERED (
[MasterId] ASC )WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS
= ON) ON [PRIMARY]
) ON [PRIMARY] GO
然后是明细表...
CREATE TABLE [dbo].[DATA_HIL_Detail](
[DetailId] [int] IDENTITY(1,1) NOT NULL,
[MasterId] [int] NOT NULL,
[ColumnName] [nvarchar](100) NULL,
[OriginalValue] [nvarchar](max) NULL,
[ModifiedValue] [nvarchar](max) NULL,
PRIMARY KEY CLUSTERED (
[DetailId] ASC
)WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON [PRIMARY] ) ON [PRIMARY] TEXTIMAGE_ON [PRIMARY] GO
我的触发器需要能够使用该更新而非表的正确信息来更新这些表。对于实例,我有另一个表。
CREATE TABLE [dbo].[CNF_Tax2Package](
[Tax2PackageId] [int] IDENTITY(1,1) NOT NULL,
[TaxPackageId] [int] NOT NULL,
[TaxId] [int] NOT NULL,
[Last_UserId_Log] [int] NULL,
[Last_WorkstationId_Log] [int] NULL,
[Last_DateTime_Log] [datetime] NULL,
PRIMARY KEY CLUSTERED
(
[Tax2PackageId] ASC
)WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY =
OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON [PRIMARY],
UNIQUE NONCLUSTERED
(
[Tax2PackageId] ASC
)WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY =
OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON [PRIMARY]
) ON [PRIMARY]
GO
每次在此CNF_Tax2Package表中更改一条记录时,我都需要使用信息来更新History表
我执行以下UPdate语句
Update CNF_Tax2Package
set TaxPackageid = 1,
Last_UserID_Log = 1098,
Last_WorkstationID_Log = 77,
Last_DateTime_Log = Getdate()
where Tax2PackageID = 2]
我将在DATA_HIL_Master中插入以下信息
[MasterId] = (NEWMasterID) [ReferenceTable] = 'CNF_Tax2Package' [ReferenceId] = 2 ---This is the primary Key of the
---table updated. [OperationType] = 'Update' [Last_UserId_Log] = 1098 [Last_WorkstationId_Log] = 77 [Last_DateTime_Log] getdate()
然后我将以下行插入DATA_HIL_Detail中。
[DetailId] = (NEWID) [MasterId] = (NEWMasterID) (From above) [ColumnName] = 'TaxPackageid' [OriginalValue] = '19' [ModifiedValue] = '1'
[DetailId] = (NEWID) [MasterId] = (NEWMasterID) (From above) [ColumnName] = 'Last_UserID_Log' [OriginalValue] = '1954' [ModifiedValue] = '1098'
[DetailId] = (NEWID) [MasterId] = (NEWMasterID) (From above) [ColumnName] = 'Last_WorkstationId_Log' [OriginalValue] = '55' [ModifiedValue] = '77'
[DetailId] = (NEWID) [MasterId] = (NEWMasterID) (From above) [ColumnName] = 'Last_DateTime_Log' [OriginalValue] = '2018-08-18 [ModifiedValue] = getdate()
理解触发器必须足够通用,才能处理数据库中具有不同列,不同主键的所有表