Sqlserver 游标&存储过程&临时表混合使用实例

通过嵌套，根据表中记录的表名与列名到指定位置取值。

--声明存储过程   ProPIMS
if (exists (select * from sys.objects where name = 'ProPIMS'))
    drop proc ProPIMS
go 
create procedure ProPIMS
@dcsgroupinfo varchar(100),@dcsmcinfo varchar (150)
AS 
BEGIN

    declare @dcsgroup varchar(50),@mc varchar(50),@dw varchar(50),@tablename varchar(50),@columnname varchar(50),@Columncount int;
    if exists(select * from tempdb..sysobjects where id=object_id('tempdb..##dcs_tablevalue'))
        drop table ##dcs_tablevalue;
    create table ##dcs_tablevalue
    (
        tablename varchar(50),
        columnname varchar(50),
        value varchar(50)
    )
    declare @charsql varchar(500)
    if cursor_status('global','mycursor')=-3 and cursor_status('local','mycursor')=-3
    declare mycursor cursor for 
        select distinct dcsgroup,mc,dw,tablename,columnname 
        from 
        (
            select a.dcsgroup,a.mc,a.dw,b.tablename,a.columnname
            from dcsdata.dcsdatainf a
            left join dcsdata.dcsgroup b on a.dcsgroup = b.groupname
        )total
    open mycursor 
        fetch next from mycursor into @dcsgroup,@mc,@dw,@tablename,@columnname
        while(@@FETCH_STATUS = 0)
        begin
            set @Columncount = 0;
            SELECT @Columncount = count(*) from syscolumns where name= @columnname and id=object_id(@tablename);
            if(@Columncount = 1)
                set @charsql = 'insert into ##dcs_tablevalue  select  top 1 '''+@tablename+''','''+@columnname+''',(select top 1 ' +@columnname +' from '+ @tablename+');'
                exec(@charsql);
            fetch next from mycursor into @dcsgroup,@mc,@dw,@tablename,@columnname
        end
    close mycursor

    if(@dcsgroupinfo is not null and @dcsgroupinfo != '' and (@dcsmcinfo is null or @dcsmcinfo = ''))--取一整个模块的数据
        --查询结果集
        select distinct total.dcsgroup,total.mc,total.dw,##dcs_tablevalue.value,##dcs_tablevalue.tablename,##dcs_tablevalue.columnname
        from ##dcs_tablevalue
        left join 
        (
            select a.dcsgroup,a.mc,a.dw,b.tablename,a.columnname
            from dcsdata.dcsdatainf a
            left join dcsdata.dcsgroup b on a.dcsgroup = b.groupname
        )total on total.tablename = ##dcs_tablevalue.tablename and total.columnname = ##dcs_tablevalue.columnname
        where total.dcsgroup = @dcsgroupinfo
    else if (@dcsmcinfo = 'all')--取39个全厂概貌
        --查询结果集
        select distinct total.dcsgroup,total.mc,total.dw,##dcs_tablevalue.value,##dcs_tablevalue.tablename,##dcs_tablevalue.columnname
        from ##dcs_tablevalue
        left join 
        (
            select a.dcsgroup,a.mc,a.dw,b.tablename,a.columnname
            from dcsdata.dcsdatainf a
            left join dcsdata.dcsgroup b on a.dcsgroup = b.groupname
        )total on total.tablename = ##dcs_tablevalue.tablename and total.columnname = ##dcs_tablevalue.columnname
        where mc in 
        ('中压蒸汽压力','低压蒸汽压力','下段气总管压力','中段气总管压力','清洗气总管压力',
        '滤过真空度','循环水压力','下段气总流量','中段气总流量','清洗气总流量',
        '重碱皮带秤','真空淡液塔淡液流量','热母液总管流量','蒸馏灰乳总流量','取出液总流量',
        '淡氨盐水总流量','冷母液流量','碳化尾气总管压力','热氨盐水桶液位','冷氨盐水桶液位',
        '中和水贮桶液位','1#热母液液位','2#热母液液位','1#冷母液桶液位','2#冷母液桶液位',
        'I组中和水温度','II组中和水温度','III组中和水温度','滤过吹风压力','循环水温度',
        '冷冻水温度','氨盐水总管温度','重碱精盐水总流量','氨气总管温度','精盐水温度',
        '淡液塔中部温度','去盐水循环水温度','滤过洗水温度','滤碱机总洗水流量')
        and dcsgroup in ('重碱碳滤DCS','煅烧DCS')
    else if(@dcsgroupinfo is null or @dcsgroupinfo = '')--取所有数据
    --查询结果集
        select distinct total.dcsgroup,total.mc,total.dw,##dcs_tablevalue.value,##dcs_tablevalue.tablename,##dcs_tablevalue.columnname
        from ##dcs_tablevalue
        left join 
        (
            select a.dcsgroup,a.mc,a.dw,b.tablename,a.columnname
            from dcsdata.dcsdatainf a
            left join dcsdata.dcsgroup b on a.dcsgroup = b.groupname
        )total on total.tablename = ##dcs_tablevalue.tablename and total.columnname = ##dcs_tablevalue.columnname
    else--取相关模块相关子模块的数据
        --查询结果集
        select distinct total.dcsgroup,total.mc,total.dw,##dcs_tablevalue.value,##dcs_tablevalue.tablename,##dcs_tablevalue.columnname
        from ##dcs_tablevalue
        left join 
        (
            select a.dcsgroup,a.mc,a.dw,b.tablename,a.columnname
            from dcsdata.dcsdatainf a
            left join dcsdata.dcsgroup b on a.dcsgroup = b.groupname
        )total on total.tablename = ##dcs_tablevalue.tablename and total.columnname = ##dcs_tablevalue.columnname
        where total.dcsgroup = @dcsgroupinfo and total.mc like @dcsmcinfo
END
--执行存储过程