Apply stored procedures to build data tables on a monthly basis

Stored Procedures | data
In order to facilitate the storage of the database, data backup, recovery, in the actual library, we hope to be able to build the data table according to the specific date, for example, the event table we can establish as ev_yyyymm (yyyy for the year, MM for the month), using stored procedures can solve dynamic table. (source code is as follows:)

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Stored Procedure Original Code * * *
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= = = The stored procedure for generating tables prcreatedatetable===
SET QUOTED_IDENTIFIER OFF
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ALTER PROCEDURE prcreatedatetable
As
--Initialization
DECLARE @intErrorCode int,--error number, successfully displayed 0
@dtmCheckDay datetime,--System current time
@str varchar, @SubStr varchar (10),
@chrnSQL nvarchar (1000)--sql query statement
DECLARE @chvSuffixTableName varchar (50), date suffix of table name
@chvFinalTableName1 varchar (40)--Name of the table to be detected
@chvFinalTableName2 varchar (40),
@chvFinalTableName3 varchar (40),
@chvFinalTableName4 varchar (40),
@chvFinalTableName5 varchar (40),
@chvFinalTableName6 varchar (40),
@chvFinalTableName7 varchar (40),
@chvFinalTableName8 varchar (40)

SELECT @dtmCheckDay = getdate ()
SELECT @chvSuffixTableName = dbo.fnformatdate_month (@dtmCheckDay)---a formatted month to use the custom function

SELECT @chvFinalTableName1 = ' ev_ ' + ' _ ' + @chvSuffixTableName

--The query has no @chvtablename_xxxxxx (years), that is, the @chvfinaltablename table, if not the establishment
BEGIN
IF not EXISTS (SELECT * from sysobjects WHERE NAME = @chvFinalTableName1 and xtype= ' U ')--event table
BEGIN
SELECT @chrnSQL = ' CREATE TABLE [dbo]. [' + @chvFinalTableName8 + '] ( '
+ ' [evid] [char] (a) COLLATE chinese_prc_ci_as not NULL, '
+ ' [startime] [datetime] not NULL, '
+ ' [starstake] [varchar] (9) COLLATE chinese_prc_ci_as not NULL, '
+ ' [endstake] [varchar] (9) COLLATE chinese_prc_ci_as not NULL, '
+ ' [direcation] [char] (1) COLLATE chinese_prc_ci_as not NULL, '
+ ' [evtype] [varchar] (3) COLLATE chinese_prc_ci_as not NULL, '
+ ' [Endtime] [datetime] NULL, '
+ ' [Description] [varchar] COLLATE chinese_prc_ci_as NULL, '
+ ' [Advice] [varchar] COLLATE chinese_prc_ci_as NULL, '
+ ' [econloss] [int] NULL, '
+ ' [deathtoll] [tinyint] NULL, '
+ ' CONSTRAINT ' + @chvFinalTableName8 + ' _pk ' + ' PRIMARY KEY CLUSTERED ([evid]) on [PRIMARY] '
+ ') on [PRIMARY] '
EXEC sp_executesql @chrnSQL
End
End;

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SET QUOTED_IDENTIFIER OFF
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= = = Get Date Custom Function = = =
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ALTER FUNCTION fnformatdate_month (@DATE datetime)
RETURNS varchar (50)
As
BEGIN
DECLARE @intDateYear int,---year to process data
@intDateMonthNo int---months to process data
DECLARE @chvMonthNo varchar (10),
@chvTableName varchar (50)

Select @intDateYear = year (@DATE)
Select @intDateMonthNo = Month (@DATE) Select @chvMonthNo = ' +convert ' (varchar (2), @intDateMonthNo)
Select @chvMonthNo =substring (@chvMonthNo, Len (@chvMonthNo)-1, 2
Select @chvTableName =convert (varchar (4), @intDateYear) + @chvMonthNo
Return (@chvTableName)
End

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