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mysql 5.0´æ´¢¹ý³Ìѧϰ×ܽá
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create procedure sp_name()
begin
………
end
2.²ÎÊý´«µÝ
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1.»ù±¾Óï·¨£ºcall sp_name()
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drop procedure sp_name//
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begin
……
end;
Ò²¿ÉÒÔ¸øÇø¿éÆð±ðÃû£¬È磺
lable:begin
………..
end lable;
¿ÉÒÔÓÃleave lable;Ìø³öÇø¿é£¬Ö´ÐÐÇø¿éÒÔºóµÄ´úÂë
2.Ìõ¼þÓï¾ä
if Ìõ¼þ then
statement
else
statement
end if;
3.Ñ»·Óï¾ä
(1).whileÑ»·
[label:] WHILE expression DO
statements
END WHILE [label] ;
(2).loopÑ»·
[label:] LOOP
statements
END LOOP [label];
(3).repeat untilÑ»·
[label:] REPEAT
statements
UNTIL expression
END REPEAT [label] ;
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1.show procedure status
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2.show create procedure sp_name
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mysql´æ´¢¹ý³Ìѧϰ×ܽᣲÙ×÷·û
ËãÊõÔËËã·û
+ ¼Ó SET var1=2+2; 4
- ¼õ SET var2=3-2; 1
* ³Ë SET var3=3*2; 6
/ ³ý SET var4=10/3; 3.3333
DIV Õû³ý SET var5=10 DIV 3; 3
% ȡģ SET var6=10%3 ; 1
±È½ÏÔËËã·û
> ´óÓÚ 1>2 False
< СÓÚ 2<1 False
<= СÓÚµÈÓÚ 2<=2 True
>= &nb
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1.½¨±í¹ý³ÌÈçÏÂ
create database test default character set utf8 collate utf8_general_ci
use test;
create table devicedata
(
ID int auto_increment PRIMARY key ,
TimeStamp datetime,
Device_Name varchar(100),
Tag_Name varchar(100),
Value varchar(50)
)
2 ......
1¡¢´ò¿ªÎı¾±à¼my.cnf
sudo gedit /etc/mysql/my.cnf
ÔÚ[client]
½Úµã£¬Ìí¼Ó
default-character-set=utf8 (¿Í»§¶ËȱʡÒÔutf8´æ´¢)
ÔÚ[mysqld]
½Úµã£¬Ìí¼Ó
default-character-set=utf8 (Êý¾Ý¿âȱʡÒÔutf8´æ´¢)
init_connect='SET NAMES utf8'
£¨É趨Á¬½ÓmysqlÊý¾Ý¿âʱʹÓÃutf8±àÂ룬ÒÔÈÃmysqlÊý¾Ý¿âΪutf8 ......
1.²é¿´µµ°¸
mysql> show binary logs;
+----------------+-----------+
| Log_name | File_size |
+----------------+-----------+
| ablelee.000001 | 150462942 |
| ablelee.000002 | 125 |
| ablelee.000003 | 106 |
+----------------+-----------+
2.ɾ³ýbin-log(ɾ³ýablelee.000003֮ǰµÄ¶øÃ»Óаüº¬ablel ......
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CREATE TRIGGER <´¥·¢Æ÷Ãû><--
{BEFORE | AFTER}
{ INSERT | UPDATE | DELETE }
ON <±íÃû³Æ>
FOR EACH ROW
<´¥·¢Æ÷SQLÓï¾ä>
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1.´¥·¢Æ÷±ØÐëÓÐÃû×Ö£¬×î¶à64¸ö×Ö·û£¬¿ÉÄܺóÃæ»á¸½Óзָô·û.ËüºÍMySQLÖÐÆäËû¶ÔÏóµÄÃüÃû· ......