CREATE PROC
sp_PageView
@tbname sysname, —要分页显示的表名
@FieldKey nvarchar(1000), —用于定位记录的主键(惟一键)字段,可以是逗号分隔的多个字段
@PageCurrent int=1, —要显示的页码
@PageSize int=10, —每页的大小(记录数)
@FieldShow nvarchar(1000)=”, —以逗号分隔的要显示的字段列表,如果不指定,则显示所有字段
@FieldOrder nvarchar(1000)=”, —以逗号分隔的排序字段列表,可以指定在字段后面指定DESC/ASC
用于指定排序顺序
@Where nvarchar(1000)=”, —查询条件
@PageCount int OUTPUT —总页数
AS
SET NOCOUNT ON
—检查对象是否有效
IF OBJECT_ID(@tbname) IS NULL
BEGIN
RAISERROR(N‘对象”%s”不存在‘,1,16,@tbname
)
RETURN
END
IF OBJECTPROPERTY(OBJECT_ID(@tbname),N‘IsTable‘)=0
AND OBJECTPROPERTY(OBJECT_ID(@tbname),N‘IsView‘)=0
AND OBJECTPROPERTY(OBJECT_ID(@tbname),N‘IsTableFunction‘)=0
BEGIN
RAISERROR(N‘“%s”不是表、视图或者表值函数‘,1,16,@tbname
)
RETURN
END
—分页字段检查
IF ISNULL(@FieldKey,N”)=”
BEGIN
RAISERROR(N‘分页处理需要主键（或者惟一键）‘,1,16
)
RETURN
END
—其他参数检查及规范
IF ISNULL(@PageCurrent,0)<1 SET @PageCurrent=1
IF ISNULL(@PageSize,0)<1 SET @PageSize=10
IF ISNULL(@FieldShow,N”)=N” SET @FieldShow=N‘*‘
IF ISNULL(@FieldOrder,N”)=N”
SET @FieldOrder=N”
ELSE
SET @FieldOrder=N‘ORDER BY ‘+LTRIM(@FieldOrder
)
IF ISNULL(@Where,N”)=N”
SET @Where=N”
ELSE
SET @Where=N‘WHERE (‘+@Where+N‘)‘
—如果@PageCount为NULL值,则计算总页数(这样设计可以只在第一次计算总页数,以后调用时,把总页数传回给存储过程,避免再次计算总页数,对于不想计算总页数的处理而言,可以给@PageCount赋值)
IF @PageCount IS NULL
BEGIN
DECLARE @sql nvarchar(4000
)
SET @sql=N‘SELECT @PageCount=COUNT(*)‘
+N‘ FROM ‘+@tbname
+N‘ ‘+@Where
EXEC sp_executesql @sql,N‘@PageCount int OUTPUT‘,@PageCount
OUTPUT
SET @PageCount=(@PageCount+@PageSize–1)/@PageSize
END
—计算分页显示的TOPN值
DECLARE @TopN varchar(20),@TopN1 varchar(20
)
SELECT @TopN=@PageSize
,
@TopN1=(@PageCurrent–1)*@PageSize
—第一页直接显示
IF @PageCurrent=1
EXEC(N‘SELECT TOP ‘+@TopN
+N‘ ‘+@FieldShow
+N‘ FROM ‘+@tbname
+N‘ ‘+@Where
+N‘ ‘+@FieldOrder
)
ELSE
BEGIN
—处理别名
IF @FieldShow=N‘*‘
SET @FieldShow=N‘a.*‘
—生成主键(惟一键)处理条件
DECLARE @Where1 nvarchar(4000),@Where2 nvarchar(4000
),
@s nvarchar(1000),@Field
sysname
SELECT @Where1=N”,@Where2=N”,@s=@FieldKey
WHILE CHARINDEX(N‘,‘,@s)>0
SELECT @Field=LEFT(@s,CHARINDEX(N‘,‘,@s)–1
),
@s=STUFF(@s,1,CHARINDEX(N‘,‘,@s),N”
),
@Where1=@Where1+N‘ AND a.‘+@Field+N‘=b.‘+@Field
,
@Where2=@Where2+N‘ AND b.‘+@Field+N‘ IS NULL‘
,
@Where=REPLACE(@Where,@Field,N‘a.‘+@Field
),
@FieldOrder=REPLACE(@FieldOrder,@Field,N‘a.‘+@Field
),
@FieldShow=REPLACE(@FieldShow,@Field,N‘a.‘+@Field
)
SELECT @Where=REPLACE(@Where,@s,N‘a.‘+@s
),
@FieldOrder=REPLACE(@FieldOrder,@s,N‘a.‘+@s
),
@FieldShow=REPLACE(@FieldShow,@s,N‘a.‘+@s
),
@Where1=STUFF(@Where1+N‘ AND a.‘+@s+N‘=b.‘+@s,1,5,N”
),
@Where2=CASE
WHEN @Where=” THEN N‘WHERE (‘
ELSE @Where+N‘ AND (‘
END+N‘b.‘+@s+N‘ IS NULL‘+@Where2+N‘)‘
—执行查询
EXEC(N‘SELECT TOP ‘+@TopN
+N‘ ‘+@FieldShow
+N‘ FROM ‘+@tbname
+N‘ a LEFT JOIN(SELECT TOP ‘+@TopN1
+N‘ ‘+@FieldKey
+N‘ FROM ‘+@tbname
+N‘ a ‘+@Where
+N‘ ‘+@FieldOrder
+N‘)b ON ‘+@Where1
+N‘ ‘+@Where2
+N‘ ‘+@FieldOrder
)
END
sp_PageView
@tbname sysname, —要分页显示的表名
@FieldKey nvarchar(1000), —用于定位记录的主键(惟一键)字段,可以是逗号分隔的多个字段
@PageCurrent int=1, —要显示的页码
@PageSize int=10, —每页的大小(记录数)
@FieldShow nvarchar(1000)=”, —以逗号分隔的要显示的字段列表,如果不指定,则显示所有字段
@FieldOrder nvarchar(1000)=”, —以逗号分隔的排序字段列表,可以指定在字段后面指定DESC/ASC
用于指定排序顺序
@Where nvarchar(1000)=”, —查询条件
@PageCount int OUTPUT —总页数
AS
SET NOCOUNT ON
—检查对象是否有效
IF OBJECT_ID(@tbname) IS NULL
BEGIN
RAISERROR(N‘对象”%s”不存在‘,1,16,@tbname
)
RETURN
END
IF OBJECTPROPERTY(OBJECT_ID(@tbname),N‘IsTable‘)=0
AND OBJECTPROPERTY(OBJECT_ID(@tbname),N‘IsView‘)=0
AND OBJECTPROPERTY(OBJECT_ID(@tbname),N‘IsTableFunction‘)=0
BEGIN
RAISERROR(N‘“%s”不是表、视图或者表值函数‘,1,16,@tbname
)
RETURN
END
—分页字段检查
IF ISNULL(@FieldKey,N”)=”
BEGIN
RAISERROR(N‘分页处理需要主键（或者惟一键）‘,1,16
)
RETURN
END
—其他参数检查及规范
IF ISNULL(@PageCurrent,0)<1 SET @PageCurrent=1
IF ISNULL(@PageSize,0)<1 SET @PageSize=10
IF ISNULL(@FieldShow,N”)=N” SET @FieldShow=N‘*‘
IF ISNULL(@FieldOrder,N”)=N”
SET @FieldOrder=N”
ELSE
SET @FieldOrder=N‘ORDER BY ‘+LTRIM(@FieldOrder
)
IF ISNULL(@Where,N”)=N”
SET @Where=N”
ELSE
SET @Where=N‘WHERE (‘+@Where+N‘)‘
—如果@PageCount为NULL值,则计算总页数(这样设计可以只在第一次计算总页数,以后调用时,把总页数传回给存储过程,避免再次计算总页数,对于不想计算总页数的处理而言,可以给@PageCount赋值)
IF @PageCount IS NULL
BEGIN
DECLARE @sql nvarchar(4000
)
SET @sql=N‘SELECT @PageCount=COUNT(*)‘
+N‘ FROM ‘+@tbname
+N‘ ‘+@Where
EXEC sp_executesql @sql,N‘@PageCount int OUTPUT‘,@PageCount
OUTPUT
SET @PageCount=(@PageCount+@PageSize–1)/@PageSize
END
—计算分页显示的TOPN值
DECLARE @TopN varchar(20),@TopN1 varchar(20
)
SELECT @TopN=@PageSize
,
@TopN1=(@PageCurrent–1)*@PageSize
—第一页直接显示
IF @PageCurrent=1
EXEC(N‘SELECT TOP ‘+@TopN
+N‘ ‘+@FieldShow
+N‘ FROM ‘+@tbname
+N‘ ‘+@Where
+N‘ ‘+@FieldOrder
)
ELSE
BEGIN
—处理别名
IF @FieldShow=N‘*‘
SET @FieldShow=N‘a.*‘
—生成主键(惟一键)处理条件
DECLARE @Where1 nvarchar(4000),@Where2 nvarchar(4000
),
@s nvarchar(1000),@Field
sysname
SELECT @Where1=N”,@Where2=N”,@s=@FieldKey
WHILE CHARINDEX(N‘,‘,@s)>0
SELECT @Field=LEFT(@s,CHARINDEX(N‘,‘,@s)–1
),
@s=STUFF(@s,1,CHARINDEX(N‘,‘,@s),N”
),
@Where1=@Where1+N‘ AND a.‘+@Field+N‘=b.‘+@Field
,
@Where2=@Where2+N‘ AND b.‘+@Field+N‘ IS NULL‘
,
@Where=REPLACE(@Where,@Field,N‘a.‘+@Field
),
@FieldOrder=REPLACE(@FieldOrder,@Field,N‘a.‘+@Field
),
@FieldShow=REPLACE(@FieldShow,@Field,N‘a.‘+@Field
)
SELECT @Where=REPLACE(@Where,@s,N‘a.‘+@s
),
@FieldOrder=REPLACE(@FieldOrder,@s,N‘a.‘+@s
),
@FieldShow=REPLACE(@FieldShow,@s,N‘a.‘+@s
),
@Where1=STUFF(@Where1+N‘ AND a.‘+@s+N‘=b.‘+@s,1,5,N”
),
@Where2=CASE
WHEN @Where=” THEN N‘WHERE (‘
ELSE @Where+N‘ AND (‘
END+N‘b.‘+@s+N‘ IS NULL‘+@Where2+N‘)‘
—执行查询
EXEC(N‘SELECT TOP ‘+@TopN
+N‘ ‘+@FieldShow
+N‘ FROM ‘+@tbname
+N‘ a LEFT JOIN(SELECT TOP ‘+@TopN1
+N‘ ‘+@FieldKey
+N‘ FROM ‘+@tbname
+N‘ a ‘+@Where
+N‘ ‘+@FieldOrder
+N‘)b ON ‘+@Where1
+N‘ ‘+@Where2
+N‘ ‘+@FieldOrder
)
END
转载于:https://www.cnblogs.com/3_mu/archive/2010/06/27/1766131.html
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