Oracle SqlServer 比较
ORACLE * SQLSERVER 描述
1 ROWNUM ①; selectidentity(int,1,1)rownum,列名into#tempfrom; 表
select*from#tempwhererownum>10andrownum<=20
牺牲性能
② select ROW_NUMBER() OVER (ORDER BY 列名 desc) AS rowNum,* from 表名
ORDER BY 列名 desc
可以列出所有记录,RowNUM不能用于条件
③ Select top N from 表
2 存储过程里面定义函数; 不支持
3 TYPE work_table is TABLE of VARCHAR(6) INDEX BY BINARY_INTEGERDECLARE @ltb_mailplan;;Table(ColName VARCHAR(6) null)
4 lv2_startdateVARCHAR(20); DECLARE @lv2_startdateVARCHAR(20)
5 MOD; %
6 trunc(sysdate - to_date('2010/1/01','yyyy/mm/dd')); SELECT datediff( day,; '2010/02/01',getdate() )
7 TO_CHAR(sysdate,'DY');;set language N'Korean'
select datename(weekday, getdate())
星期几
8 select INSTR('sdsq','s',2) value from dualselect CHARINDEX('s','sdsq',2) value
9 TO_CHAR(sysdate,'DD'); DatePart(Getdate,'DD')
10 select trunc(sysdate) value from dual
select to_char(sysdate,'yyyy-mm-dd') value from dual
select convert(char(10),getdate(),111) value
11 TO_CHAR(sysdate,'YYYY/MM/DD'); SELECTLTRIM(RTRIM(CONVERT(varchar(100), GETDATE(), 111))) 2010-1-21
12 TO_CHAR(sysdate,'HH24:MI:SS'); SELECTLTRIM(RTRIM(CONVERT(varchar(100), GETDATE(), 8))) 10:58:55
13 TO_CHAR(sysdate,'YYYY/MM/DD HH24:MI:SS')CONVERT(varchar(100), GETDATE(), 20)
14 PRAGMA AUTONOMOUS_TRANSACTION;BEGIN TRANSACTION
15 ||; +
16 RAISE_APPLICATION_ERROR('-20050', lv2_msg)①
EXECsp_addmessage@msgnum=50006,@severity=14,
@msgtext='%sloginfailed!',@lang='us_english'
EXECsp_addmessage@msgnum=50006,@severity=14,
@msgtext='%1!登陆失败!'
RAISERROR(50006, 14, 1,'Xing')
错误信息处理
17; ② RAISERROR('Xingaixin',16,1,'') 13000-50000 >50001个人定制信息
18 CURSOR lcur_mailplan (daid AvGomacSettings.DataAreaId%TYPE) IS 23:23
SELECT DISTINCT avMailplan FROM; avtimeperiod
WHERE DataAreaId = daid AND TRUNC(avTpdate) = TRUNC(sysdate);
DECLARE lcur_mailplan CURSOR FOR
SELECT DISTINCT avMailplan FROM; avtimeperiod
WHERE DataAreaId = @lv2_dataareaid AND CONVERT(varchar(10),avTpdate,120) =CONVERT(varchar(10),GetDate(),120);
13000-50000 >50001个人定制信息
19;FOR tp_rec IN lcur_mailplan (@lv2_dataareaid)
LOOP
@ltb_mailplan(@lbi_index) = tp_rec.AvMailplan;
@lbi_index = @lbi_index + 1;
END LOOP;
OPEN lcur_mailplan
FETCH; lcur_mailplan INTO @ltb_mailplan_Value
WHILE(@@FETCH_STATUS=0)
BEGIN
BEGIN
INSERT INTO @ltb_mailplan(ColName)
VALUES(@ltb_mailplan_Value)
END
FETCH; lcur_mailplan INTO @ltb_mailplan_Value
END
close lcur_mailplan
deallocate lcur_mailplan
20 LOOP ..;;;;END; LOOP; While 条件 BEGIN .. END
21 CHR(2); CHAR(2)
22 ELSIF; ELSE IF
23 SUBSTR; SUBSTRING
24 NLS_LOWER; selectlower('dAcB')
25 NLS_UPPER; selectupper('dAa')
26 IF 条件 Then ELSIF 条件 THEN END IF; IF 条件 Begin END Else IF Begin ...END
27 TRUNC(SYSDATE); SELECT CONVERT(varchar(100), GETDATE(), 101); 2006-5-16
28 ISNULL(COLNAME,''); nvl(COLNAME,'')
29 TO_NUMBER(TO_CHAR(SYSDATE, 'SSSSS'));select datediff(ss,Convert(datetime,CONVERT(varchar(100), GETDATE(), 101)),getdate()); 从0点以来渐失秒数。
30; EXECUTE IMMEDIATE @lv2_updatesql USING @lv2_status, @an_code, @lv2_user, @ld_date, @ln_time,
@lv2_dataareaid, @lv2_salesid;