锘??xml version="1.0" encoding="utf-8" standalone="yes"?>色综合咪咪久久网,成人精品在线视频,欧美精品激情http://www.aygfsteel.com/pushan/archive/2008/10/15/mysql.html嫻極嫻風洍嫻極嫻風洍Wed, 15 Oct 2008 06:55:00 GMThttp://www.aygfsteel.com/pushan/archive/2008/10/15/mysql.htmlhttp://www.aygfsteel.com/pushan/comments/234447.htmlhttp://www.aygfsteel.com/pushan/archive/2008/10/15/mysql.html#Feedback0http://www.aygfsteel.com/pushan/comments/commentRss/234447.htmlhttp://www.aygfsteel.com/pushan/services/trackbacks/234447.html涓.鍒涘緩瀛樺偍榪囩▼

1.鍩烘湰璇硶錛?

 

create procedure sp_name()
begin
………
end

2.鍙傛暟浼犻?/p>

浜?璋冪敤瀛樺偍榪囩▼

1.鍩烘湰璇硶錛歝all sp_name()
娉ㄦ剰錛氬瓨鍌ㄨ繃紼嬪悕縐板悗闈㈠繀欏誨姞鎷彿錛屽摢鎬曡瀛樺偍榪囩▼娌℃湁鍙傛暟浼犻?/div>

涓?鍒犻櫎瀛樺偍榪囩▼

1.鍩烘湰璇硶錛?br /> drop procedure sp_name//
2.娉ㄦ剰浜嬮」
(1)涓嶈兘鍦ㄤ竴涓瓨鍌ㄨ繃紼嬩腑鍒犻櫎鍙︿竴涓瓨鍌ㄨ繃紼嬶紝鍙兘璋冪敤鍙︿竴涓瓨鍌ㄨ繃紼?/div>

鍥?鍖哄潡錛屾潯浠訛紝寰幆

1.鍖哄潡瀹氫箟錛屽父鐢?br /> begin
……
end;
涔熷彲浠ョ粰鍖哄潡璧峰埆鍚嶏紝濡傦細
lable:begin
………..
end lable;
鍙互鐢╨eave lable;璺沖嚭鍖哄潡錛屾墽琛屽尯鍧椾互鍚庣殑浠ｇ爜
2.鏉′歡璇彞

 

if 鏉′歡 then
statement
else
statement
end if;

3.寰幆璇彞
(1).while寰幆

[label:] WHILE expression DO

statements

END WHILE [label] ;

 

(2).loop寰幆

 

[label:] LOOP

statements

END LOOP [label];

 

(3).repeat until寰幆

 

[label:] REPEAT

statements

UNTIL expression

END REPEAT [label] ;

 

浜?鍏朵粬甯哥敤鍛戒護

1.show procedure status
鏄劇ず鏁版嵁搴撲腑鎵鏈夊瓨鍌ㄧ殑瀛樺偍榪囩▼鍩烘湰淇℃伅錛屽寘鎷墍灞炴暟鎹簱錛屽瓨鍌ㄨ繃紼嬪悕縐幫紝鍒涘緩鏃墮棿絳?br /> 2.show create procedure sp_name
鏄劇ず鏌愪竴涓瓨鍌ㄨ繃紼嬬殑璇︾粏淇℃伅

 

mysql瀛樺偍榪囩▼涓鐢ㄥ埌鐨勮繍綆楃

mysql瀛樺偍榪囩▼瀛︿範鎬葷粨錛嶆搷浣滅

綆楁湳榪愮畻絎?/strong>

+     鍔?nbsp;  SET var1=2+2;       4
-     鍑?nbsp;  SET var2=3-2;       1
*     涔?nbsp;  SET var3=3*2;       6
/     闄?nbsp;  SET var4=10/3;      3.3333
DIV   鏁撮櫎 SET var5=10 DIV 3;  3
%     鍙栨ā SET var6=10%3 ;     1

姣旇緝榪愮畻絎?/strong>

>            澶т簬 1>2 False
<            灝忎簬 2<1 False
<=           灝忎簬絳変簬 2<=2 True
>=           澶т簬絳変簬 3>=2 True
BETWEEN      鍦ㄤ袱鍊間箣闂?nbsp;5 BETWEEN 1 AND 10 True
NOT BETWEEN  涓嶅湪涓ゅ間箣闂?nbsp;5 NOT BETWEEN 1 AND 10 False
IN           鍦ㄩ泦鍚堜腑 5 IN (1,2,3,4) False
NOT IN       涓嶅湪闆嗗悎涓?nbsp;5 NOT IN (1,2,3,4) True
=            絳変簬 2=3 False
<>, !=       涓嶇瓑浜?nbsp;2<>3 False
<=>          涓ユ牸姣旇緝涓や釜NULL鍊兼槸鍚︾浉絳?nbsp;NULL<=>NULL True
LIKE         綆鍗曟ā寮忓尮閰?nbsp;"Guy Harrison" LIKE "Guy%" True
REGEXP       姝ｅ垯寮忓尮閰?nbsp;"Guy Harrison" REGEXP "[Gg]reg" False
IS NULL      涓虹┖ 0 IS NULL False
IS NOT NULL  涓嶄負絀?nbsp;0 IS NOT NULL True

閫昏緫榪愮畻絎?/strong>

涓?/strong>(AND)






 

 

AND

TRUE

FALSE

NULL

TRUE

TRUE

FALSE

NULL

FALSE

FALSE

FALSE

NULL

NULL

NULL

NULL

NULL

鎴?OR)

 

 

OR

TRUE

FALSE

NULL

TRUE

TRUE

TRUE

TRUE

FALSE

TRUE

FALSE

NULL

NULL

TRUE

NULL

NULL

寮傛垨(XOR)

 

 

XOR

TRUE

FALSE

NULL

TRUE

FALSE

TRUE

NULL

FALSE

TRUE

FALSE

NULL

NULL

NULL

NULL

NULL

浣嶈繍綆楃

|   浣嶆垨
&   浣嶄笌
<<  宸︾Щ浣?br /> >>  鍙崇Щ浣?br /> ~   浣嶉潪(鍗曠洰榪愮畻錛屾寜浣嶅彇鍙?

 

mysq瀛樺偍榪囩▼涓父鐢ㄧ殑鍑芥暟錛屽瓧絎︿覆綾誨瀷鎿嶄綔錛屾暟瀛︾被錛屾棩鏈熸椂闂寸被銆?/p>

mysql瀛樺偍榪囩▼鍩烘湰鍑芥暟

涓.瀛楃涓茬被 

CHARSET(str) //榪斿洖瀛椾覆瀛楃闆?br /> CONCAT (string2  [,... ]) //榪炴帴瀛椾覆
INSTR (string ,substring ) //榪斿洖substring棣栨鍦╯tring涓嚭鐜扮殑浣嶇疆,涓嶅瓨鍦ㄨ繑鍥?
LCASE (string2 ) //杞崲鎴愬皬鍐?br /> LEFT (string2 ,length ) //浠巗tring2涓殑宸﹁竟璧峰彇length涓瓧絎?br /> LENGTH (string ) //string闀垮害
LOAD_FILE (file_name ) //浠庢枃浠惰鍙栧唴瀹?br /> LOCATE (substring , string  [,start_position ] ) 鍚孖NSTR,浣嗗彲鎸囧畾寮濮嬩綅緗?br /> LPAD (string2 ,length ,pad ) //閲嶅鐢╬ad鍔犲湪string寮澶?鐩村埌瀛椾覆闀垮害涓簂ength
LTRIM (string2 ) //鍘婚櫎鍓嶇絀烘牸
REPEAT (string2 ,count ) //閲嶅count嬈?br /> REPLACE (str ,search_str ,replace_str ) //鍦╯tr涓敤replace_str鏇挎崲search_str
RPAD (string2 ,length ,pad) //鍦╯tr鍚庣敤pad琛ュ厖,鐩村埌闀垮害涓簂ength
RTRIM (string2 ) //鍘婚櫎鍚庣絀烘牸
STRCMP (string1 ,string2 ) //閫愬瓧絎︽瘮杈冧袱瀛椾覆澶у皬,
SUBSTRING (str , position  [,length ]) //浠巗tr鐨刾osition寮濮?鍙杔ength涓瓧絎?
娉細mysql涓鐞嗗瓧絎︿覆鏃訛紝榛樿絎竴涓瓧絎︿笅鏍囦負1錛屽嵆鍙傛暟position蹇呴』澶т簬絳変簬1

 

mysql> select substring(’abcd’,0,2);
+鈥斺斺斺斺斺斺?#8211;+
| substring(’abcd’,0,2) |
+鈥斺斺斺斺斺斺?#8211;+
|                       |
+鈥斺斺斺斺斺斺?#8211;+
1 row in set (0.00 sec)

 

mysql> select substring(’abcd’,1,2);
+鈥斺斺斺斺斺斺?#8211;+
| substring(’abcd’,1,2) |
+鈥斺斺斺斺斺斺?#8211;+
| ab                    |
+鈥斺斺斺斺斺斺?#8211;+
1 row in set (0.02 sec)

TRIM([[BOTH|LEADING|TRAILING] [padding] FROM]string2) //鍘婚櫎鎸囧畾浣嶇疆鐨勬寚瀹氬瓧絎?br /> UCASE (string2 ) //杞崲鎴愬ぇ鍐?br /> RIGHT(string2,length) //鍙杝tring2鏈鍚巐ength涓瓧絎?br /> SPACE(count) //鐢熸垚count涓┖鏍?nbsp;

浜?鏁板綾?/span>

ABS (number2 ) //緇濆鍊?br /> BIN (decimal_number ) //鍗佽繘鍒惰漿浜岃繘鍒?br /> CEILING (number2 ) //鍚戜笂鍙栨暣
CONV(number2,from_base,to_base) //榪涘埗杞崲
FLOOR (number2 ) //鍚戜笅鍙栨暣
FORMAT (number,decimal_places ) //淇濈暀灝忔暟浣嶆暟
HEX (DecimalNumber ) //杞崄鍏繘鍒?br /> 娉細HEX()涓彲浼犲叆瀛楃涓詫紝鍒欒繑鍥炲叾ASC-11鐮侊紝濡侶EX(’DEF’)榪斿洖4142143
涔熷彲浠ヤ紶鍏ュ崄榪涘埗鏁存暟錛岃繑鍥炲叾鍗佸叚榪涘埗緙栫爜錛屽HEX(25)榪斿洖19
LEAST (number , number2  [,..]) //姹傛渶灝忓?br /> MOD (numerator ,denominator ) //姹備綑
POWER (number ,power ) //姹傛寚鏁?br /> RAND([seed]) //闅忔満鏁?br /> ROUND (number  [,decimals ]) //鍥涜垗浜斿叆,decimals涓哄皬鏁頒綅鏁癩

 

娉細榪斿洖綾誨瀷騫墮潪鍧囦負鏁存暟錛屽錛?br /> (1)榛樿鍙樹負鏁村艦鍊?br /> mysql> select round(1.23);
+鈥斺斺斺?+
| round(1.23) |
+鈥斺斺斺?+
|           1 |
+鈥斺斺斺?+
1 row in set (0.00 sec)

 

mysql> select round(1.56);
+鈥斺斺斺?+
| round(1.56) |
+鈥斺斺斺?+
|           2 |
+鈥斺斺斺?+
1 row in set (0.00 sec)

(2)鍙互璁懼畾灝忔暟浣嶆暟錛岃繑鍥炴誕鐐瑰瀷鏁版嵁
mysql> select round(1.567,2);
+鈥斺斺斺斺?+
| round(1.567,2) |
+鈥斺斺斺斺?+
|           1.57 |
+鈥斺斺斺斺?+
1 row in set (0.00 sec)

SIGN (number2 ) //榪斿洖絎﹀彿,姝ｈ礋鎴?
SQRT(number2) //寮騫蟲柟

 
涓?鏃ユ湡鏃墮棿綾?/span>
 

ADDTIME (date2 ,time_interval ) //灝唗ime_interval鍔犲埌date2
CONVERT_TZ (datetime2 ,fromTZ ,toTZ ) //杞崲鏃跺尯
CURRENT_DATE (  ) //褰撳墠鏃ユ湡
CURRENT_TIME (  ) //褰撳墠鏃墮棿
CURRENT_TIMESTAMP (  ) //褰撳墠鏃墮棿鎴?br /> DATE (datetime ) //榪斿洖datetime鐨勬棩鏈熼儴鍒?br /> DATE_ADD (date2 , INTERVAL d_value d_type ) //鍦╠ate2涓姞涓婃棩鏈熸垨鏃墮棿
DATE_FORMAT (datetime ,FormatCodes ) //浣跨敤formatcodes鏍煎紡鏄劇ずdatetime
DATE_SUB (date2 , INTERVAL d_value d_type ) //鍦╠ate2涓婂噺鍘諱竴涓椂闂?br /> DATEDIFF (date1 ,date2 ) //涓や釜鏃ユ湡宸?br /> DAY (date ) //榪斿洖鏃ユ湡鐨勫ぉ
DAYNAME (date ) //鑻辨枃鏄熸湡
DAYOFWEEK (date ) //鏄熸湡(1-7) ,1涓烘槦鏈熷ぉ
DAYOFYEAR (date ) //涓騫翠腑鐨勭鍑犲ぉ
EXTRACT (interval_name  FROM date ) //浠巇ate涓彁鍙栨棩鏈熺殑鎸囧畾閮ㄥ垎
MAKEDATE (year ,day ) //緇欏嚭騫村強騫翠腑鐨勭鍑犲ぉ,鐢熸垚鏃ユ湡涓?br /> MAKETIME (hour ,minute ,second ) //鐢熸垚鏃墮棿涓?br /> MONTHNAME (date ) //鑻辨枃鏈堜喚鍚?br /> NOW (  ) //褰撳墠鏃墮棿
SEC_TO_TIME (seconds ) //縐掓暟杞垚鏃墮棿
STR_TO_DATE (string ,format ) //瀛椾覆杞垚鏃墮棿,浠ormat鏍煎紡鏄劇ず
TIMEDIFF (datetime1 ,datetime2 ) //涓や釜鏃墮棿宸?br /> TIME_TO_SEC (time ) //鏃墮棿杞鏁癩
WEEK (date_time [,start_of_week ]) //絎嚑鍛?br /> YEAR (datetime ) //騫翠喚
DAYOFMONTH(datetime) //鏈堢殑絎嚑澶?br /> HOUR(datetime) //灝忔椂
LAST_DAY(date) //date鐨勬湀鐨勬渶鍚庢棩鏈?br /> MICROSECOND(datetime) //寰
MONTH(datetime) //鏈?br /> MINUTE(datetime) //鍒?/div>


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