mysql 5.0´æ´¢¹ý³Ìѧϰ×ܽá
mysql 5.0´æ´¢¹ý³Ìѧϰ×ܽá
Ò».´´½¨´æ´¢¹ý³Ì
1.»ù±¾Óï·¨£º
create procedure sp_name()
begin
………
end
2.²ÎÊý´«µÝ
¶þ.µ÷Óô洢¹ý³Ì
1.»ù±¾Óï·¨£ºcall sp_name()
×¢Ò⣺´æ´¢¹ý³ÌÃû³ÆºóÃæ±ØÐë¼ÓÀ¨ºÅ£¬ÄÄŸô洢¹ý³ÌûÓвÎÊý´«µÝ
Èý.ɾ³ý´æ´¢¹ý³Ì
1.»ù±¾Óï·¨£º
drop procedure sp_name//
2.×¢ÒâÊÂÏî
(1)²»ÄÜÔÚÒ»¸ö´æ´¢¹ý³ÌÖÐɾ³ýÁíÒ»¸ö´æ´¢¹ý³Ì£¬Ö»Äܵ÷ÓÃÁíÒ»¸ö´æ´¢¹ý³Ì
ËÄ.Çø¿é£¬Ìõ¼þ£¬Ñ»·
1.Çø¿é¶¨Ò壬³£ÓÃ
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] ;
Îå.ÆäËû³£ÓÃÃüÁî
1.show procedure status
ÏÔʾÊý¾Ý¿âÖÐËùÓд洢µÄ´æ´¢¹ý³Ì»ù±¾ÐÅÏ¢£¬°üÀ¨ËùÊôÊý¾Ý¿â£¬´æ´¢¹ý³ÌÃû³Æ£¬´´½¨Ê±¼äµÈ
2.show create procedure sp_name
ÏÔʾijһ¸ö´æ´¢¹ý³ÌµÄÏêϸÐÅÏ¢
mysql´æ´¢¹ý³ÌÖÐÒªÓõ½µÄÔËËã·û
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
Ïà¹ØÎĵµ£º
#!/bin/bash
#ɾ³ý100¸öÊý¾Ý¿âÖеÄ1000¸ö±íµÄ¹ýÆÚÊý¾Ý
DBHOST="127.0.0.1"
DBPWD="pwd"
DBUSER="root"
MYSQLBIN="/usr/local/mysql/bin/mysql"
for((dbindex = 0;dbindex < 100;dbindex++))
do
for((tabindex = 0;tabindex < 10;tabindex++))
do
if [&n ......
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 ......
mysqlÖÐINSTRº¯ÊýµÄÓ÷¨
INSTR(×Ö¶ÎÃû, ×Ö·û´®)
Õâ¸öº¯Êý·µ»Ø×Ö·û´®ÔÚijһ¸ö×ֶεÄÄÚÈÝÖеÄλÖÃ, ûÓÐÕÒµ½×Ö·û´®·µ»Ø0£¬·ñÔò·µ»ØÎ»Ö㨴Ó1¿ªÊ¼£©
SELECT * from tblTopic ORDER BY INSTR( topicTitle, 'ha' ) > 0 DESC
SELECT INSTR( topicTitle, 'ha' ) from tblTopic
mysqlÖÐʹÓÃinstrÅäºÏINÅÅÐò
½«instr½á¹û×÷Î ......
1£º ASCII(str) ¡¡·µ»Ø×Ö·û´®strµÄµÚÒ»¸ö×Ö·ûµÄASCIIÖµ(strÊǿմ®Ê±·µ»Ø0) mysql> select ASCII('2'); ¡¡¡¡-> 50 mysql> select ASCII(2); ¡¡¡¡-> 50 mysql> select ASCII('dete'); ¡¡¡¡-> 100
2£ºORD(str) ¡¡Èç¹û×Ö·û´®str¾äÊ×Êǵ¥×Ö½Ú·µ»ØÓëASCII()º¯Êý·µ»ØµÄÏàֵͬ¡£¡¡Èç¹ûÊÇÒ»¸ö¶à×Ö½Ú×Ö·û,ÒÔ¸ñʽ·µ ......
1¡¢Ñ¡È¡×îÊÊÓõÄ×Ö¶ÎÊôÐÔ
¡¡¡¡MySQL¿ÉÒԺܺõÄÖ§³Ö´óÊý¾ÝÁ¿µÄ´æÈ¡£¬µ«ÊÇÒ»°ã˵À´£¬Êý¾Ý¿âÖеıíԽС£¬ÔÚËüÉÏÃæÖ´ÐеIJéѯҲ¾Í»áÔ½¿ì¡£Òò´Ë£¬ÔÚ´´½¨±íµÄʱºò£¬ÎªÁË»ñµÃ¸üºÃµÄÐÔÄÜ£¬ÎÒÃÇ¿ÉÒÔ½«±íÖÐ×ֶεĿí¶ÈÉèµÃ¾¡¿ÉÄÜС¡£ÀýÈ磬ÔÚ¶¨ÒåÓÊÕþ±àÂëÕâ¸ö×Ö¶Îʱ£¬Èç¹û½«ÆäÉèÖÃΪCHAR(255),ÏÔÈ»¸øÊý¾Ý¿âÔö¼ÓÁ˲»±ØÒªµÄ¿Õ¼ä£¬ÉõÖÁÊ ......