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jia su PHP dong tai wang zhan guan yu MySQL suo yin fen xi you hua

2008-06-12 07:24:36 编辑來源:互联网 评论
 
 
 
本文为【加速PHP动态网站 关于MySQL索引分析优化】的拼音翻译版
  ben wen zhu yao jiang shu le ru he jia su dong tai wang zhan de MySQL suo yin fen xi he you hua 。 iSH zhong guo jiao cheng zai xian
  yi 、 shen me shi suo yin ? iSH zhong guo jiao cheng zai xian
  suo yin yong lai kuai su di xun zhao na xie ju you te ding zhi de ji lu , suo you MySQL suo yin dou yi B- shu de xing shi bao cun 。 ru guo mei you suo yin , zhi xing cha xun shi MySQL bi xu cong di yi ge ji lu kai shi sao miao zheng ge biao de suo you ji lu , zhi zhi zhao dao fu he yao qiu de ji lu 。 biao li mian de ji lu shu liang yue duo , zhe ge cao zuo de dai jia jiu yue gao 。 ru guo zuo wei sou suo tiao jian de lie shang yi jing chuang jian le suo yin ,MySQL wu xu sao miao ren he ji lu ji ke xun su de dao mu biao ji lu suo zai de wei zhi 。 ru guo biao you 1000 ge ji lu , tong guo suo yin cha zhao ji lu zhi shao yao bi shun xu sao miao ji lu kuai 100 bei 。 iSH zhong guo jiao cheng zai xian
  jia she wo men chuang jian le yi ge ming wei people de biao : iSH zhong guo jiao cheng zai xian
  CREATE TABLE people ( peopleid SMALLINT NOT NULL, iSH zhong guo jiao cheng zai xian
  name CHAR(50) NOT NULL );iSH zhong guo jiao cheng zai xian
  ran hou , wo men wan quan sui ji ba 1000 ge bu tong name zhi cha ru dao people biao 。 zai shu ju wen jian zhong name lie mei you ren he ming que de ci xu 。 ru guo wo men chuang jian le name lie de suo yin ,MySQL jiang zai suo yin zhong pai xu name lie , dui yu suo yin zhong de mei yi xiang ,MySQL zai nei bu wei ta bao cun yi ge shu ju wen jian zhong shi ji ji lu suo zai wei zhi de “ zhi zhen ”。 yin ci , ru guo wo men yao cha zhao name deng yu “Mike” ji lu de peopleid(SQL ming ling wei “SELECT peopleid FROM people WHERE name='Mike';”),MySQL neng gou zai name de suo yin zhong cha zhao “Mike” zhi , ran hou zhi jie zhuan dao shu ju wen jian zhong xiang ying de xing , zhun que di fan hui gai xing de peopleid(999)。 zai zhe ge guo cheng zhong ,MySQL zhi xu chu li yi ge xing jiu ke yi fan hui jie guo 。 ru guo mei you “name” lie de suo yin ,MySQL yao sao miao shu ju wen jian zhong de suo you ji lu , ji 1000 ge ji lu ! xian ran , xu yao MySQL chu li de ji lu shu liang yue shao , ze ta wan cheng ren wu de su du jiu yue kuai 。 iSH zhong guo jiao cheng zai xian
  er 、 suo yin de lei xing iSH zhong guo jiao cheng zai xian
  MySQL ti gong duo zhong suo yin lei xing gong xuan ze : iSH zhong guo jiao cheng zai xian
  pu tong suo yin : iSH zhong guo jiao cheng zai xian
  zhe shi zui ji ben de suo yin lei xing , er qie ta mei you wei yi xing zhi lei de xian zhi 。 pu tong suo yin ke yi tong guo yi xia ji zhong fang shi chuang jian : iSH zhong guo jiao cheng zai xian
  chuang jian suo yin , li ru CREATE INDEX < suo yin de ming zi > ON tablename ( lie de lie biao ); iSH zhong guo jiao cheng zai xian
  xiu gai biao , li ru ALTER TABLE tablename ADD INDEX [ suo yin de ming zi ] ( lie de lie biao ); iSH zhong guo jiao cheng zai xian
  chuang jian biao de shi hou zhi ding suo yin , li ru CREATE TABLE tablename ( [...], INDEX [ suo yin de ming zi ] ( lie de lie biao ) ); iSH zhong guo jiao cheng zai xian
  wei yi xing suo yin : iSH zhong guo jiao cheng zai xian
  zhe zhong suo yin he qian mian de “ pu tong suo yin ” ji ben xiang tong , dan you yi ge qu bie : suo yin lie de suo you zhi dou zhi neng chu xian yi ci , ji bi xu wei yi 。 wei yi xing suo yin ke yi yong yi xia ji zhong fang shi chuang jian : iSH zhong guo jiao cheng zai xian
  chuang jian suo yin , li ru CREATE UNIQUE INDEX < suo yin de ming zi > ON tablename ( lie de lie biao ); iSH zhong guo jiao cheng zai xian
  xiu gai biao , li ru ALTER TABLE tablename ADD UNIQUE [ suo yin de ming zi ] ( lie de lie biao ); iSH zhong guo jiao cheng zai xian
  chuang jian biao de shi hou zhi ding suo yin , li ru CREATE TABLE tablename ( [...], UNIQUE [ suo yin de ming zi ] ( lie de lie biao ) ); iSH zhong guo jiao cheng zai xian
  zhu jian : iSH zhong guo jiao cheng zai xian
  zhu jian shi yi zhong wei yi xing suo yin , dan ta bi xu zhi ding wei “PRIMARY KEY”。 ru guo ni zeng jing yong guo AUTO_INCREMENT lei xing de lie , ni ke neng yi jing shu xi zhu jian zhi lei de gai nian le 。 zhu jian yi ban zai chuang jian biao de shi hou zhi ding , li ru “CREATE TABLE tablename ( [...], PRIMARY KEY ( lie de lie biao ) ); ”。 dan shi , wo men ye ke yi tong guo xiu gai biao de fang shi jia ru zhu jian , li ru “ALTER TABLE tablename ADD PRIMARY KEY ( lie de lie biao ); ”。 mei ge biao zhi neng you yi ge zhu jian 。 iSH zhong guo jiao cheng zai xian
  quan wen suo yin : iSH zhong guo jiao cheng zai xian
  MySQL cong 3.23.23 ban kai shi zhi chi quan wen suo yin he quan wen jian suo 。 zai MySQL zhong , quan wen suo yin de suo yin lei xing wei FULLTEXT。 quan wen suo yin ke yi zai VARCHAR huo zhe TEXT lei xing de lie shang chuang jian 。 ta ke yi tong guo CREATE TABLE ming ling chuang jian , ye ke yi tong guo ALTER TABLE huo CREATE INDEX ming ling chuang jian 。 dui yu da gui mo de shu ju ji , tong guo ALTER TABLE( huo zhe CREATE INDEX) ming ling chuang jian quan wen suo yin yao bi ba ji lu cha ru dai you quan wen suo yin de kong biao geng kuai 。【原文】【汉音对照
 
 
 
 
 
 
 
 
 
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ben wen zhu yao jiang shu le ru he jia su dong tai wang zhan de MySQL suo yin fen xi he you hua 。 iSH zhong guo jiao cheng zai xian yi 、 shen me shi suo yin ? iSH zhong guo jiao cheng zai xian suo yin yong lai kuai su di xun zhao na xie ju you te ding zhi de ji lu , suo you MySQL suo yin dou yi B- shu de xing shi bao cun 。 ru guo mei you suo yin , zhi xing cha xun shi MySQL bi xu cong di yi ge ji lu kai shi sao miao zheng ge biao de suo you ji lu , zhi zhi zhao dao fu he yao qiu de ji lu 。 biao li mian de ji lu shu liang yue duo , zhe ge cao zuo de dai jia jiu yue gao 。 ru guo zuo wei sou suo tiao jian de lie shang yi jing chuang jian le suo yin ,MySQL wu xu sao miao ren he ji lu ji ke xun su de dao mu biao ji lu suo zai de wei zhi 。 ru guo biao you 1000 ge ji lu , tong guo suo yin cha zhao ji lu zhi shao yao bi shun xu sao miao ji lu kuai 100 bei 。 iSH zhong guo jiao cheng zai xian jia she wo men chuang jian le yi ge ming wei people de biao : iSH zhong guo jiao cheng zai xian CREATE TABLE people ( peopleid SMALLINT NOT NULL, iSH zhong guo jiao cheng zai xian name CHAR(50) NOT NULL );iSH zhong guo jiao cheng zai xian ran hou , wo men wan quan sui ji ba 1000 ge bu tong name zhi cha ru dao people biao 。 zai shu ju wen jian zhong name lie mei you ren he ming que de ci xu 。 ru guo wo men chuang jian le name lie de suo yin ,MySQL jiang zai suo yin zhong pai xu name lie , dui yu suo yin zhong de mei yi xiang ,MySQL zai nei bu wei ta bao cun yi ge shu ju wen jian zhong shi ji ji lu suo zai wei zhi de “ zhi zhen ”。 yin ci , ru guo wo men yao cha zhao name deng yu “Mike” ji lu de peopleid(SQL ming ling wei “SELECT peopleid FROM people WHERE name='Mike';”),MySQL neng gou zai name de suo yin zhong cha zhao “Mike” zhi , ran hou zhi jie zhuan dao shu ju wen jian zhong xiang ying de xing , zhun que di fan hui gai xing de peopleid(999)。 zai zhe ge guo cheng zhong ,MySQL zhi xu chu li yi ge xing jiu ke yi fan hui jie guo 。 ru guo mei you “name” lie de suo yin ,MySQL yao sao miao shu ju wen jian zhong de suo you ji lu , ji 1000 ge ji lu ! xian ran , xu yao MySQL chu li de ji lu shu liang yue shao , ze ta wan cheng ren wu de su du jiu yue kuai 。 iSH zhong guo jiao cheng zai xian er 、 suo yin de lei xing iSH zhong guo jiao cheng zai xian MySQL ti gong duo zhong suo yin lei xing gong xuan ze : iSH zhong guo jiao cheng zai xian pu tong suo yin : iSH zhong guo jiao cheng zai xian zhe shi zui ji ben de suo yin lei xing , er qie ta mei you wei yi xing zhi lei de xian zhi 。 pu tong suo yin ke yi tong guo yi xia ji zhong fang shi chuang jian : iSH zhong guo jiao cheng zai xian chuang jian suo yin , li ru CREATE INDEX < suo yin de ming zi > ON tablename ( lie de lie biao ); iSH zhong guo jiao cheng zai xian xiu gai biao , li ru ALTER TABLE tablename ADD INDEX [ suo yin de ming zi ] ( lie de lie biao ); iSH zhong guo jiao cheng zai xian chuang jian biao de shi hou zhi ding suo yin , li ru CREATE TABLE tablename ( [...], INDEX [ suo yin de ming zi ] ( lie de lie biao ) ); iSH zhong guo jiao cheng zai xian wei yi xing suo yin : iSH zhong guo jiao cheng zai xian zhe zhong suo yin he qian mian de “ pu tong suo yin ” ji ben xiang tong , dan you yi ge qu bie : suo yin lie de suo you zhi dou zhi neng chu xian yi ci , ji bi xu wei yi 。 wei yi xing suo yin ke yi yong yi xia ji zhong fang shi chuang jian : iSH zhong guo jiao cheng zai xian chuang jian suo yin , li ru CREATE UNIQUE INDEX < suo yin de ming zi > ON tablename ( lie de lie biao ); iSH zhong guo jiao cheng zai xian xiu gai biao , li ru ALTER TABLE tablename ADD UNIQUE [ suo yin de ming zi ] ( lie de lie biao ); iSH zhong guo jiao cheng zai xian chuang jian biao de shi hou zhi ding suo yin , li ru CREATE TABLE tablename ( [...], UNIQUE [ suo yin de ming zi ] ( lie de lie biao ) ); iSH zhong guo jiao cheng zai xian zhu jian : iSH zhong guo jiao cheng zai xian zhu jian shi yi zhong wei yi xing suo yin , dan ta bi xu zhi ding wei “PRIMARY KEY”。 ru guo ni zeng jing yong guo AUTO_INCREMENT lei xing de lie , ni ke neng yi jing shu xi zhu jian zhi lei de gai nian le 。 zhu jian yi ban zai chuang jian biao de shi hou zhi ding , li ru “CREATE TABLE tablename ( [...], PRIMARY KEY ( lie de lie biao ) ); ”。 dan shi , wo men ye ke yi tong guo xiu gai biao de fang shi jia ru zhu jian , li ru “ALTER TABLE tablename ADD PRIMARY KEY ( lie de lie biao ); ”。 mei ge biao zhi neng you yi ge zhu jian 。 iSH zhong guo jiao cheng zai xian quan wen suo yin : iSH zhong guo jiao cheng zai xian MySQL cong 3.23.23 ban kai shi zhi chi quan wen suo yin he quan wen jian suo 。 zai MySQL zhong , quan wen suo yin de suo yin lei xing wei FULLTEXT。 quan wen suo yin ke yi zai VARCHAR huo zhe TEXT lei xing de lie shang chuang jian 。 ta ke yi tong guo CREATE TABLE ming ling chuang jian , ye ke yi tong guo ALTER TABLE huo CREATE INDEX ming ling chuang jian 。 dui yu da gui mo de shu ju ji , tong guo ALTER TABLE( huo zhe CREATE INDEX) ming ling chuang jian quan wen suo yin yao bi ba ji lu cha ru dai you quan wen suo yin de kong biao geng kuai 。
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