存储过程
业务系统需要一个关于合同状态的报表，主要显示合同的状态，地区，合同客户类型，合同金额，利息金额等信息.
在数据库中存在4个表
crec01c,sysc01,sysc03d,crmc02分别是'合同主表','区域及业务伙伴','系统状态代码','法人信息表'
下面第一个存储过程是我第一次写的,执行时间是5秒
 ------------------效率较差的存储过程---------------------------
 CREATE TABLE #tmptba --创建一个临时表，用于储存我们的结果
 (
  colID int IDENTITY(1,1) PRIMARY KEY CLUSTERED,
  khlx varchar(20),
  dq varchar(20),
  ywhb varchar(40),
  htzt varchar(20),
  htbs int ,
  htje numeric(13,2),
  lxje numeric(13,2)
 )
DECLARE  bkhlx char(1), ikhid int, cywdbd char(10), chtzt char(1), njkje numeric(13,2), iqx int, nhtyll numeric(8,6) --FOR Progress
DECLARE t_khlx varchar(20), t_dq varchar(20), t_ywhb varchar(40), t_htzt varchar(20), t_htbs int, t_htje numeric(13,2), t_lxje numeric(13,2)--FOR INSERT INTO #tmptba
--DECLARE index int
--SET index = 1
DECLARE cur1 CURSOR FOR SELECT bkhlx, ikhid, cywdbd, chtzt, njkje, iqx, nhtyll FROM crec01c
OPEN cur1
FETCH NEXT FROM cur1 INTO bkhlx, ikhid, cywdbd, chtzt, njkje, iqx, nhtyll
WHILE FETCH_STATUS = 0
BEGIN
  IF bkhlx = '1'
      BEGIN
          SET t_khlx = '自然人'
          SET t_dq  = (SELECT vjgmc FROM sysc01 WHERE cjgdm = left(cywdbd,6))
      END
  ELSE
      BEGIN
          SET t_khlx = '法人'
          SET t_dq = (SELECT vjgmc FROM sysc01 WHERE cjgdm = (SELECT cbmdm FROM crmc02 WHERE frid = ikhid ) )
      END
    SET t_htbs = 1-- index--合同笔数

    SET t_ywhb = (SELECT vjgmc FROM sysc01 WHERE cjgdm = cywdbd)--业务伙伴
    SET t_htzt = (SELECT vsjxc FROM sysc03d WHERE czddm = 'htzt' AND csjxm = chtzt)--合同状态
    SET t_htje = njkje
    SET t_lxje = njkje * iqx * nhtyll * 0.001

   INSERT INTO #tmptba (khlx, dq, ywhb, htzt, htbs, htje, lxje) VALUES (t_khlx, t_dq, t_ywhb, t_htzt, t_htbs, t_htje, t_lxje)
      --SET index  1
  FETCH NEXT FROM cur1 INTO bkhlx, ikhid, cywdbd, chtzt, njkje, iqx, nhtyll
END
CLOSE cur1
DEALLOCATE cur1
SELECT * FROM #tmptba
GO
 ------------------效率较高的存储过程执行时间是1秒---------------------------
 CREATE TABLE #tmptbl --创建一个临时表，用于储存我们的结果
 (
  colID int IDENTITY(1,1) PRIMARY KEY CLUSTERED,
  khlx varchar(20),
  dq varchar(20),
  ywhb varchar(40),
  htzt varchar(20),
  htbs int ,
  htje numeric(13,2),
  lxje numeric(13,2)
 )
INSERT INTO #tmptbl SELECT CASE WHEN a.bkhlx = '1' THEN '自然人' ELSE '法人' END AS khlx, dq = (SELECT vjgmc FROM sysc01 WHERE cjgdm = left(a.cywdbd,6)), ywhb = (SELECT vjgmc FROM sysc01 WHERE cjgdm = a.cywdbd), htzt = (SELECT vsjxc FROM sysc03d WHERE czddm = 'htzt' AND csjxm = a.chtzt), htbs = 1, htje = a.njkje, lxje = a.njkje * a.iqx * a.nhtyll * 0.001 FROM crec01c a WHERE a.bkhlx = '1'

INSERT INTO #tmptbl SELECT CASE WHEN a.bkhlx = '1' THEN '自然人' ELSE '法人' END AS khlx, dq = (SELECT vjgmc FROM sysc01 WHERE cjgdm = (SELECT cbmdm FROM crmc02 WHERE frid = a.ikhid)), ywhb = '无', htzt = (SELECT vsjxc FROM sysc03d WHERE czddm = 'htzt' AND csjxm = a.chtzt), htbs = 1, htje = a.njkje, lxje = a.njkje * a.iqx * a.nhtyll * 0.001 FROM crec01c a WHERE a.bkhlx = '2'

SELECT * FROM #tmptbl
GO


可以看到，第二个存储过程只用了两条sql语句就完成了第一个存储过程的工作。