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SQL Server shu ju ku cha xun you hua de chang yong fang fa zong jie

2008-07-19 08:21:47 编辑來源:互联网 评论
 
本文为【SQL Server数据库查询优化的常用方法总结】的拼音翻译版
  SQL Server shu ju ku cha xun you hua de chang yong fang fa zong jie :
  ben wen zhong ,abigale dai biao cha xun zi fu chuan ,ada dai biao shu ju biao ming ,alice dai biao zi duan ming 。
  ji qiao yi :
  wen ti lei xing :ACCESS shu ju ku zi duan zhong han you ri wen pian jia ming huo qi ta bu ming zi fu shi cha xun hui ti shi nei cun yi chu 。
  jie jue fang fa : xiu gai cha xun yu ju
  sql="select * from ada where alice like '%"&abigale&"%'"
  gai wei
  sql="select * from ada"
  rs.filter = "alice like '%"&abigale&"%'"
  ji qiao er :
  wen ti lei xing : ru he yong jian yi de ban fa shi xian lei si bai du de duo guan jian ci cha xun ( duo guan jian ci yong kong ge huo qi ta fu hao jian ge )。
  jie jue fang fa :
  '// yong kong ge fen ge cha xun zi fu chuan
  ck=split(abigale," ")
  '// de dao fen ge hou de shu liang
  sck=UBound(ck)
  sql="select * ada where"
  zai yi ge zi duan zhong cha xun
  For i = 0 To sck
  SQL = SQL & tempJoinWord & "(" & _
  "alice like '"&ck(i)&"%')"
  tempJoinWord = " and "
  Next
  zai er ge zi duan zhong tong shi cha xun
  For i = 0 To sck
  SQL = SQL & tempJoinWord & "(" & _
  "alice like '"&ck(i)&"%' or " & _
  "alice1 like '"&ck(i)&"%')"
  tempJoinabigale = " and "
  Next
  ji qiao san : ti gao cha xun xiao lv de ji zhong ji qiao
  1. jin liang bu yao shi yong or, shi yong or hui yin qi quan biao sao miao , jiang da da jiang di cha xun xiao lv 。
  2. jing guo shi jian yan zheng ,charindex() bing bu bi qian mian jia % de like geng neng ti gao cha xun xiao lv , bing qie charindex() hui shi suo yin shi qu zuo yong ( zhi sqlserver shu ju ku )
  3. alice like '%"&abigale&"%' hui shi suo yin bu qi zuo yong
  like '"&abigale&"%' hui shi suo yin qi zuo yong ( qu diao qian mian de % fu hao )
  ( zhi sqlserver shu ju ku )
  4. '%"&abigale&"%' yu '"&abigale&"%' zai cha xun shi de qu bie :
  bi ru ni de zi duan nei rong wei : si ka bu luo ji shi
  '%"&abigale&"%' : hui tong pei suo you zi fu chuan , bu lun cha “ ji shi ” huan shi cha “ si ka ”, dou hui xian shi jie guo 。
  '"&abigale&"%' : zhi tong pei qian mian de zi fu chuan , li ru cha “ ji shi ” shi mei you jie guo de , zhi you cha “ si ka ”, cai hui xian shi jie guo 。
  5. zi duan ti qu yao an zhao “ xu duo shao 、 ti duo shao ” de yuan ze , bi mian “select *”, jin liang shi yong “select zi duan 1, zi duan 2, zi duan 3........”。 shi jian zheng ming : mei shao ti qu yi ge zi duan , shu ju de ti qu su du jiu hui you xiang ying de ti sheng 。 ti sheng de su du huan yao kan nin she qi de zi duan de da xiao lai pan duan 。
  6. order by an ju ji suo yin lie pai xu xiao lv zui gao 。 yi ge sqlserver shu ju biao zhi neng jian li yi ge ju ji suo yin , yi ban mo ren wei ID, ye ke yi gai wei qi ta de zi duan 。
  7. wei ni de biao jian li shi dang de suo yin , jian li suo yin ke yi shi ni de cha xun su du ti gao ji shi ji bai bei 。( zhi sqlserver shu ju ku )
  yi xia shi jian li suo yin yu bu jian li suo yin de yi ge cha xun xiao lv fen xi :
  Sqlserver suo yin yu cha xun xiao lv fen xi 。
  biao News
  zi duan
  Id: zi dong bian hao
  Title: wen zhang biao ti
  Author: zuo zhe
  Content: nei rong
  Star: you xian ji
  Addtime: shi jian
  ji lu :100 wan tiao
  ce shi ji qi :P4 2.8/1G nei cun /IDE ying pan
  fang an 1:
  zhu jian Id, mo ren wei ju ji suo yin , bu jian li qi ta fei ju ji suo yin
  select * from News where Title like '%"&abigale&"%'
  or Author like '%"&abigale&"%' order by Id desc
  
  cong zi duan Title he Author zhong mo hu jian suo , an Id pai xu
  cha xun shi jian :50 miao
  fang an 2:
  zhu jian Id, mo ren wei ju ji suo yin
  zai Title、Author、Star shang jian li fei ju ji suo yin
  select * from News where Title like '"&abigale&"%'
  or Author like '"&abigale&"%' order by Id desc
  
  cong zi duan Title he Author zhong mo hu jian suo , an Id pai xu
  cha xun shi jian :2 - 2.5 miao
  fang an 3:
  zhu jian Id, mo ren wei ju ji suo yin
  zai Title、Author、Star shang jian li fei ju ji suo yin
  select * from News where Title like '"&abigale&"%'
  or Author like '"&abigale&"%' order by Star desc
  
  cong zi duan Title he Author zhong mo hu jian suo , an Star pai xu
  cha xun shi jian :2 miao
  fang an 4:
  zhu jian Id, mo ren wei ju ji suo yin
  zai Title、Author、Star shang jian li fei ju ji suo yin
  select * from News where Title like '"&abigale&"%' or Author like '"&abigale&"%'
  
  cong zi duan Title he Author zhong mo hu jian suo , bu pai xu cha xun shi jian :1.8 - 2 miao
  fang an 5:
  zhu jian Id, mo ren wei ju ji suo yin
  zai Title、Author、Star shang jian li fei ju ji suo yin
  select * from News where Title like '"&abigale&"%'
  huo
  select * from News where Author like '"&abigale&"%'
  cong zi duan Title huo Author zhong jian suo , bu pai xu cha xun shi jian :1 miao【原文】【汉音对照
 
 
 
 
 
 
 
 
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SQL Server shu ju ku cha xun you hua de chang yong fang fa zong jie : ben wen zhong ,abigale dai biao cha xun zi fu chuan ,ada dai biao shu ju biao ming ,alice dai biao zi duan ming 。 ji qiao yi : wen ti lei xing :ACCESS shu ju ku zi duan zhong han you ri wen pian jia ming huo qi ta bu ming zi fu shi cha xun hui ti shi nei cun yi chu 。 jie jue fang fa : xiu gai cha xun yu ju sql="select * from ada where alice like '%"&abigale&"%'" gai wei sql="select * from ada" rs.filter = "alice like '%"&abigale&"%'" ji qiao er : wen ti lei xing : ru he yong jian yi de ban fa shi xian lei si bai du de duo guan jian ci cha xun ( duo guan jian ci yong kong ge huo qi ta fu hao jian ge )。 jie jue fang fa : '// yong kong ge fen ge cha xun zi fu chuan ck=split(abigale," ") '// de dao fen ge hou de shu liang sck=UBound(ck) sql="select * ada where" zai yi ge zi duan zhong cha xun For i = 0 To sck SQL = SQL & tempJoinWord & "(" & _ "alice like '"&ck(i)&"%')" tempJoinWord = " and " Next zai er ge zi duan zhong tong shi cha xun For i = 0 To sck SQL = SQL & tempJoinWord & "(" & _ "alice like '"&ck(i)&"%' or " & _ "alice1 like '"&ck(i)&"%')" tempJoinabigale = " and " Next ji qiao san : ti gao cha xun xiao lv de ji zhong ji qiao 1. jin liang bu yao shi yong or, shi yong or hui yin qi quan biao sao miao , jiang da da jiang di cha xun xiao lv 。 2. jing guo shi jian yan zheng ,charindex() bing bu bi qian mian jia % de like geng neng ti gao cha xun xiao lv , bing qie charindex() hui shi suo yin shi qu zuo yong ( zhi sqlserver shu ju ku ) 3. alice like '%"&abigale&"%' hui shi suo yin bu qi zuo yong like '"&abigale&"%' hui shi suo yin qi zuo yong ( qu diao qian mian de % fu hao ) ( zhi sqlserver shu ju ku ) 4. '%"&abigale&"%' yu '"&abigale&"%' zai cha xun shi de qu bie : bi ru ni de zi duan nei rong wei : si ka bu luo ji shi '%"&abigale&"%' : hui tong pei suo you zi fu chuan , bu lun cha “ ji shi ” huan shi cha “ si ka ”, dou hui xian shi jie guo 。 '"&abigale&"%' : zhi tong pei qian mian de zi fu chuan , li ru cha “ ji shi ” shi mei you jie guo de , zhi you cha “ si ka ”, cai hui xian shi jie guo 。 5. zi duan ti qu yao an zhao “ xu duo shao 、 ti duo shao ” de yuan ze , bi mian “select *”, jin liang shi yong “select zi duan 1, zi duan 2, zi duan 3........”。 shi jian zheng ming : mei shao ti qu yi ge zi duan , shu ju de ti qu su du jiu hui you xiang ying de ti sheng 。 ti sheng de su du huan yao kan nin she qi de zi duan de da xiao lai pan duan 。 6. order by an ju ji suo yin lie pai xu xiao lv zui gao 。 yi ge sqlserver shu ju biao zhi neng jian li yi ge ju ji suo yin , yi ban mo ren wei ID, ye ke yi gai wei qi ta de zi duan 。 7. wei ni de biao jian li shi dang de suo yin , jian li suo yin ke yi shi ni de cha xun su du ti gao ji shi ji bai bei 。( zhi sqlserver shu ju ku ) yi xia shi jian li suo yin yu bu jian li suo yin de yi ge cha xun xiao lv fen xi : Sqlserver suo yin yu cha xun xiao lv fen xi 。 biao News zi duan Id: zi dong bian hao Title: wen zhang biao ti Author: zuo zhe Content: nei rong Star: you xian ji Addtime: shi jian ji lu :100 wan tiao ce shi ji qi :P4 2.8/1G nei cun /IDE ying pan fang an 1: zhu jian Id, mo ren wei ju ji suo yin , bu jian li qi ta fei ju ji suo yin select * from News where Title like '%"&abigale&"%' or Author like '%"&abigale&"%' order by Id desc cong zi duan Title he Author zhong mo hu jian suo , an Id pai xu cha xun shi jian :50 miao fang an 2: zhu jian Id, mo ren wei ju ji suo yin zai Title、Author、Star shang jian li fei ju ji suo yin select * from News where Title like '"&abigale&"%' or Author like '"&abigale&"%' order by Id desc cong zi duan Title he Author zhong mo hu jian suo , an Id pai xu cha xun shi jian :2 - 2.5 miao fang an 3: zhu jian Id, mo ren wei ju ji suo yin zai Title、Author、Star shang jian li fei ju ji suo yin select * from News where Title like '"&abigale&"%' or Author like '"&abigale&"%' order by Star desc cong zi duan Title he Author zhong mo hu jian suo , an Star pai xu cha xun shi jian :2 miao fang an 4: zhu jian Id, mo ren wei ju ji suo yin zai Title、Author、Star shang jian li fei ju ji suo yin select * from News where Title like '"&abigale&"%' or Author like '"&abigale&"%' cong zi duan Title he Author zhong mo hu jian suo , bu pai xu cha xun shi jian :1.8 - 2 miao fang an 5: zhu jian Id, mo ren wei ju ji suo yin zai Title、Author、Star shang jian li fei ju ji suo yin select * from News where Title like '"&abigale&"%' huo select * from News where Author like '"&abigale&"%' cong zi duan Title huo Author zhong jian suo , bu pai xu cha xun shi jian :1 miao
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