MySQL与Oracle的语法区别详细对比

这篇文章主要为大家详细介绍了MySQL与Oracle的语法区别详细对比，具有一定的参考价值，可以用来参考一下。

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代码如下:

 
declare @id varchar(50); 
set @id='4028e4962c3df257012c3df3b4850001'; 
select * from sims_sample_detect where ID= @id; 

代码如下:

 
set @a = 189; 
select * from bc_article where id = @a //不用declare 

代码如下:

 
DELIMITER $$ 
DROP PROCEDURE IF EXISTS `SIMS`.`transaction_delSampleInfo`$$ 
CREATE DEFINER=`root`@`%` PROCEDURE `transaction_delSampleInfo`(in sampleInfoId varchar(50)) 
BEGIN 
start transaction; 
update sims_sample_info set del='1' where ID = sampleInfoId; 
update sims_sample_detect set del='1' where SAMPLE_ID_PARENT = sampleInfoId; 
update sims_sample_detect_info set del='1' where DETECT_ID in( 
select ID from sims_sample_detect where SAMPLE_ID_PARENT = sampleInfoId 
); 
commit; 
END$$ 
DELIMITER ; 

代码如下:

 
DELIMITER $$ 
DROP PROCEDURE IF EXISTS `test`.`liyukun`$$ 
CREATE DEFINER=`ids`@`localhost` PROCEDURE `liyukun`(out z int) 
BEGIN 
declare count1 int; 
DECLARE done INT DEFAULT 0; 
declare v_haoma varchar(50); 
declare v_yingyeting varchar(100); 
DECLARE cur1 CURSOR FOR select haoma,yingyeting from eryue where id<2; 
DECLARE CONTINUE HANDLER FOR NOT FOUND SET done=1; 
//这里和oracle有区别，Oracle的PL/SQL的指针有个隐性变 
量%notfound，Mysql是通过一个Error handler的声明来进行判断的 
OPEN cur1; 
cur1: LOOP 
FETCH cur1 INTO v_haoma,v_yingyeting; 
IF done=1 THEN //如果没有数据了，则离开 
LEAVE cur1; 
ELSE 
select count(*) into count1 from year2012 where haoma=v_haoma ; 
if(count1=0) then 
insert into year2012(haoma, yingyeting) 
values(v_haoma,v_yingyeting); 
else 
set z = z+1; 
update year2012 set eryue = ‘100' where haoma=v_haoma; 
end if; 
END IF; 
END LOOP cur1; 
CLOSE cur1; 
END$$ 
DELIMITER ; 

代码如下:

 
call liyukun(@a); 
select @a; 

代码如下:

 
A ： SQL> select lpad('test',8,0) from dual; 
LPAD('TEST',8,0) 
---------------- 
0000test 
B： select lpad('test',8) from dual; 
LPAD('TEST',8) 
-------------- 
test 注：不写最后一个参数，函数会默认在返回值左边加一个空格。 
C： SQL> select lpad('test',2,0) from dual; 
LPAD('TEST',2,0) 
---------------- 
te 
D：SQL> select lpad('test',3) from dual; 
LPAD('TEST',3) 
-------------- 
tes 

代码如下:

 
select * from (select id,rownum as row_num from lws_q_bl_result r where r.sample_id = 'B10226072') where row_num=2 

代码如下:

 
while num<10 
loop 
str := to_char(num); 
num := num+1; 
end loop; 

代码如下:

 
for num in 1..10 --这样的缺陷是无法间隔取值 
loop 
str := to_char(num); 
end loop; 

代码如下:

 
while num<10 
do 
str := to_char(num); 
num := num+1; 
end while; 

代码如下:

 
public int insertSign(final SpaceSign sign) throws Exception { 
try{ 
KeyHolder keyHolder = new GeneratedKeyHolder(); 
final String sql = "insert into space_sign(userId,userName,nickName,contentText,contentHtml,isPublic,commentCount,userIp,status,insertTime)" + 
" values(?,?,?,?,?,?,?,?,?,?)"; 
template.update(new PreparedStatementCreator() { 
public PreparedStatement createPreparedStatement(Connection connection) throws SQLException { 
PreparedStatement ps = connection.prepareStatement(sql,Statement.RETURN_GENERATED_KEYS); 
ps.setInt(1, sign.getUserId()); 
ps.setString(2, sign.getUserName()); 
ps.setString(3, sign.getNickName()); 
ps.setString(4, sign.getContentText()); 
ps.setString(5, sign.getContentHtml()); 
ps.setInt(6, sign.getIsPublic()); 
ps.setInt(7,sign.getCommnetCount()); 
ps.setString(8, sign.getUserIp()); 
ps.setInt(9, sign.getStatus()); 
ps.setTimestamp(10, new java.sql.Timestamp(sign.getInsertTime().getTime())); 
return ps; 
} 
}, keyHolder); 
Long generatedId = keyHolder.getKey().longValue(); 
return generatedId.intValue(); 
} catch (Exception e) { 
// TODO Auto-generated catch block 
e.printStackTrace(); 
throw new SQLException("发表签名失败", e); 
} 
} 

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