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随时记录自己遇到的问题.
有时程序在调用数据库的存储过程时,调用前需要检查存储过程是否存在, 存在就直接调用,不存在就创建存储过程,然后在调用
操作方法如下:
if exists( select 1 from sys.all_objects where [type]="p" and [name]="yourprocedurename")
begin
exec yourprocedurename
end
在.net 中执行一段程序,检查数据库中有没有某一个存储过程,如果没有,就在数据中创建一个存储过程.操作代码如下:
public static string UP_GetRecordByPage = @"
IF NOT EXISTS (SELECT * FROM sys.objects WHERE object_id = OBJECT_ID(N"[dbo].[UP_GetRecordByPage]") AND type in (N"P", N"PC"))
BEGIN
EXEC dbo.sp_executesql @statement = N"
CREATE PROCEDURE [dbo].[UP_GetRecordByPage]
@tblName varchar(255), -- 表名
@fldName varchar(255), -- 主键字段名
@PageSize int = 10, -- 页尺寸
@PageIndex int = 1, -- 页码
@IsReCount bit = 0, -- 返回记录总数, 非 0 值则返回
@OrderType bit = 0, -- 设置排序类型, 非 0 值则降序
@strWhere varchar(1000) = """" -- 查询条件 (注意: 不要加 where)
AS
declare @strSQL varchar(6000) -- 主语句
declare @strTmp varchar(100) -- 临时变量(查询条件过长时可能会出错,可修改100为1000)
declare @strOrder varchar(400) -- 排序类型
declare @strSQL2 varchar(6000) -- 主语句
if @OrderType != 0
begin
set @strTmp = ""<(select min""
set @strOrder = "" order by ["" + @fldName +""] desc""
end
else
begin
set @strTmp = "">(select max""
set @strOrder = "" order by ["" + @fldName +""] asc""
end
set @strSQL = ""select top "" + str(@PageSize) + "" * from [""
+ @tblName + ""] where ["" + @fldName + ""]"" + @strTmp + ""([""
+ @fldName + ""]) from (select top "" + str((@PageIndex-1)*@PageSize) + "" [""
+ @fldName + ""] from ["" + @tblName + ""]"" + @strOrder + "") as tblTmp)""
+ @strOrder
if @strWhere != """"
set @strSQL = ""select top "" + str(@PageSize) + "" * from [""
+ @tblName + ""] where ["" + @fldName + ""]"" + @strTmp + ""([""
+ @fldName + ""]) from (select top "" + str((@PageIndex-1)*@PageSize) + "" [""
+ @fldName + ""] from ["" + @tblName + ""] where "" + @strWhere + "" ""
+ @strOrder + "") as tblTmp) and "" + @strWhere + "" "" + @strOrder
if @PageIndex = 1
begin
set @strTmp =""""
if @strWhere != """"
set @strTmp = "" where "" + @strWhere
set @strSQL = ""select top "" + str(@PageSize) + "" * from [""
+ @tblName + ""]"" + @strTmp + "" "" + @strOrder
end
exec (@strSQL)
if @IsReCount != 0
begin
set @strSQL2 = ""select count(*) as Total from ["" + @tblName + ""]""+"" where "" + @strWhere
exec (@strSQL2)
end
"
END
";
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