mysql：Cant start server: cant create PID file: No space left on device

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在某些情形下熟習SQL Server 通配符的應用可以贊助我們簡略的處理許多成績。

--應用_運算符查找Person表中以an開頭的三字母名字
USEAdventureWorks2012;
GO
SELECT FirstName, LastName
FROM Person.Person
WHERE FirstName LIKE'_an'
ORDER BY FirstName;
 
---應用[^]運算符在Contact表中查找一切名字以Al開首且第三個字母不是字母a的人
USEAdventureWorks2012;
GO
SELECT FirstName, LastName
FROM Person.Person
WHERE FirstName LIKE'Al[^a]%'
ORDER BY FirstName;
 
---應用[]運算符查找其地址中有四位郵政編碼的一切Adventure Works雇員的ID和姓名
USEAdventureWorks2012;
GO
SELECT e.BusinessEntityID, p.FirstName, p.LastName, a.PostalCode
FROMHumanResources.EmployeeAS e
INNER JOIN Person.PersonAS pON e.BusinessEntityID= p.BusinessEntityID
INNER JOIN Person.BusinessEntityAddressAS eaON e.BusinessEntityID=ea.BusinessEntityID
INNER JOIN Person.AddressAS aON a.AddressID= ea.AddressID
WHERE a.PostalCodeLIKE'[0-9][0-9][0-9][0-9]';

 
成果集：

 EmployeeID   FirstName   LastName   PostalCode
----------   ---------   ---------   ----------
290       Lynn      Tsoflias   3000

--將一張表中名字為中英文的辨別出來（自創服裝論壇t.vhao.net中的代碼）
create table tb(namenvarchar(20))
 
insert into tbvalues('kevin')
insert into tbvalues('kevin劉')
insert into tbvalues('劉')
 
select *,'Eng'from tbwherepatindex('%[a-z]%',name)>0and(patindex('%[吖-坐]%',name)=0)
union all
select *,'CN'from tbwherepatindex('%[吖-坐]%',name)>0andpatindex('%[a-z]%',name)=0
union all 
select *,'Eng&CN'from tbwhere(patindex('%[吖-坐]%',name)>0)andpatindex('%[a-z]%',name)>0

成果集：

name        
-------------------- ------
kevin        Eng
劉          CN
kevin劉       Eng&CN
 
(3 row(s) affected)