1.   w3schools.com  
      THE WORLD'S LARGEST WEB DEVELOPER SITE
        
          
                        HTML      CSS      JAVASCRIPT      SQL      PYTHON      PHP      BOOTSTRAP      HOW TO      W3.CSS      JQUERY      JAVA      MORE                         FORUM      EXERCISES       REFERENCES     
                    
        
          
      SQL Tutorial
      SQL HOMESQL IntroSQL SyntaxSQL SelectSQL Select DistinctSQL WhereSQL And, Or, NotSQL Order BySQL Insert IntoSQL Null ValuesSQL UpdateSQL DeleteSQL Select TopSQL Min and MaxSQL Count, Avg, SumSQL LikeSQL WildcardsSQL InSQL BetweenSQL AliasesSQL JoinsSQL Inner JoinSQL Left JoinSQL Right JoinSQL Full JoinSQL Self JoinSQL UnionSQL Group BySQL HavingSQL ExistsSQL Any, AllSQL Select IntoSQL Insert Into SelectSQL CaseSQL Null FunctionsSQL Stored ProceduresSQL Comments
      SQL Database
      SQL Create DBSQL Drop DBSQL Backup DBSQL Create TableSQL Drop TableSQL Alter TableSQL ConstraintsSQL Not NullSQL UniqueSQL Primary KeySQL Foreign KeySQL CheckSQL DefaultSQL IndexSQL Auto IncrementSQL DatesSQL ViewsSQL InjectionSQL Hosting
      SQL References
      SQL Keywords
        ADD  ADD CONSTRAINT  ALTER  ALTER COLUMN  ALTER TABLE  ALL  AND  ANY  AS  ASC  BACKUP DATABASE  BETWEEN  CASE  CHECK  COLUMN  CONSTRAINT  CREATE  CREATE DATABASE  CREATE INDEX  CREATE OR REPLACE VIEW  CREATE TABLE  CREATE PROCEDURE  CREATE UNIQUE INDEX  CREATE VIEW  DATABASE  DEFAULT  DELETE  DESC  DISTINCT  DROP  DROP COLUMN  DROP CONSTRAINT  DROP DATABASE  DROP DEFAULT  DROP INDEX  DROP TABLE  DROP VIEW  EXEC  EXISTS  FOREIGN KEY  FROM  FULL OUTER JOIN  GROUP BY  HAVING  IN  INDEX  INNER JOIN  INSERT INTO  INSERT INTO SELECT  IS NULL  IS NOT NULL  JOIN  LEFT JOIN  LIKE  LIMIT  NOT  NOT NULL  OR  ORDER BY  OUTER JOIN  PRIMARY KEY  PROCEDURE  RIGHT JOIN  ROWNUM  SELECT  SELECT DISTINCT  SELECT INTO  SELECT TOP  SET  TABLE  TOP  TRUNCATE TABLE  UNION  UNION ALL  UNIQUE  UPDATE  VALUES  VIEW  WHERE
      MySQL Functions
        String Functions  ASCII  CHAR_LENGTH  CHARACTER_LENGTH  CONCAT  CONCAT_WS  FIELD  FIND_IN_SET  FORMAT  INSERT  INSTR  LCASE  LEFT  LENGTH  LOCATE  LOWER  LPAD  LTRIM  MID  POSITION  REPEAT  REPLACE  REVERSE  RIGHT  RPAD  RTRIM  SPACE  STRCMP  SUBSTR  SUBSTRING  SUBSTRING_INDEX  TRIM  UCASE  UPPER  Numeric Functions  ABS  ACOS  ASIN  ATAN  ATAN2  AVG  CEIL  CEILING  COS  COT  COUNT  DEGREES  DIV  EXP  FLOOR  GREATEST  LEAST  LN  LOG  LOG10  LOG2  MAX  MIN  MOD  PI  POW  POWER  RADIANS  RAND  ROUND  SIGN  SIN  SQRT  SUM  TAN  TRUNCATE  Date Functions  ADDDATE  ADDTIME  CURDATE  CURRENT_DATE  CURRENT_TIME  CURRENT_TIMESTAMP  CURTIME  DATE  DATEDIFF  DATE_ADD  DATE_FORMAT  DATE_SUB  DAY  DAYNAME  DAYOFMONTH  DAYOFWEEK  DAYOFYEAR  EXTRACT  FROM_DAYS  HOUR  LAST_DAY  LOCALTIME  LOCALTIMESTAMP  MAKEDATE  MAKETIME  MICROSECOND  MINUTE  MONTH  MONTHNAME  NOW  PERIOD_ADD  PERIOD_DIFF  QUARTER  SECOND  SEC_TO_TIME  STR_TO_DATE  SUBDATE  SUBTIME  SYSDATE  TIME  TIME_FORMAT  TIME_TO_SEC  TIMEDIFF  TIMESTAMP  TO_DAYS  WEEK  WEEKDAY  WEEKOFYEAR  YEAR  YEARWEEK  Advanced Functions  BIN  BINARY  CASE  CAST  COALESCE  CONNECTION_ID  CONV  CONVERT  CURRENT_USER  DATABASE  IF  IFNULL  ISNULL  LAST_INSERT_ID  NULLIF  SESSION_USER  SYSTEM_USER  USER  VERSION
      SQL Server Functions
        String Functions  ASCII  CHAR  CHARINDEX  CONCAT  Concat with +  CONCAT_WS  DATALENGTH  DIFFERENCE  FORMAT  LEFT  LEN  LOWER  LTRIM  NCHAR  PATINDEX  QUOTENAME  REPLACE  REPLICATE  REVERSE  RIGHT  RTRIM  SOUNDEX  SPACE  STR  STUFF  SUBSTRING  TRANSLATE  TRIM  UNICODE  UPPER  Numeric Functions  ABS  ACOS  ASIN  ATAN  ATN2  AVG  CEILING  COUNT  COS  COT  DEGREES  EXP  FLOOR  LOG  LOG10  MAX  MIN  PI  POWER  RADIANS  RAND  ROUND  SIGN  SIN  SQRT  SQUARE  SUM  TAN  Date Functions  CURRENT_TIMESTAMP  DATEADD  DATEDIFF  DATEFROMPARTS  DATENAME  DATEPART  DAY  GETDATE  GETUTCDATE  ISDATE  MONTH  SYSDATETIME  YEAR  Advanced Functions  CAST  COALESCE  CONVERT  CURRENT_USER  IIF    ISNULL  ISNUMERIC  NULLIF  SESSION_USER  SESSIONPROPERTY  SYSTEM_USER  USER_NAME
      MS Access Functions
        String Functions  Asc  Chr  Concat with &  CurDir  Format  InStr  InstrRev  LCase  Left  Len  LTrim  Mid  Replace  Right  RTrim  Space  Split  Str  StrComp  StrConv  StrReverse  Trim  UCase  Numeric Functions  Abs  Atn  Avg  Cos  Count  Exp  Fix  Format  Int  Max  Min  Randomize  Rnd  Round  Sgn  Sqr  Sum  Val  Date Functions  Date  DateAdd  DateDiff  DatePart  DateSerial  DateValue  Day  Format  Hour  Minute  Month  MonthName  Now  Second  Time  TimeSerial  TimeValue  Weekday  WeekdayName  Year  Other Functions  CurrentUser  Environ  IsDate  IsNull  IsNumeric
      SQL OperatorsSQL Data TypesSQL Quick Ref
      SQL Examples
      SQL ExamplesSQL QuizSQL ExercisesSQL Certificate      

          
        
        
          
            
                              
                           
      SQL AND, OR and NOT Operators
      ❮ PreviousNext ❯
      The SQL AND, OR and NOT Operators
      The WHERE clause can be combined with AND, OR, and NOT operators.
      The AND and OR operators are used to filter records based on more than one condition:
          
      • The AND operator displays a record if all the conditions separated by AND   are TRUE.
        •   
      • The OR operator displays a record if any of the conditions separated by OR is TRUE.
      The NOT operator displays a record if the condition(s) is NOT TRUE.
      AND Syntax
      SELECT column1, column2, ...
      FROM table_name
      WHERE condition1 AND condition2 AND condition3 ...;
      OR Syntax
      SELECT column1, column2, ...
      FROM table_name
      WHERE condition1 OR condition2 OR condition3 ...;
      NOT Syntax
      SELECT column1, column2, ...
      FROM table_name
      WHERE NOT condition;
      Demo Database
      The table below shows the complete "Customers" table from the Northwind sample database:
        
          CustomerIDCustomerNameContactNameAddressCityPostalCodeCountry  
        
          1Alfreds FutterkisteMaria AndersObere Str. 57Berlin12209Germany  
        
          2Ana Trujillo Emparedados y heladosAna TrujilloAvda. de la Constitución 2222México D.F.05021Mexico  
        
          3Antonio Moreno TaqueríaAntonio MorenoMataderos 2312México D.F.05023Mexico  
        
          4Around the HornThomas Hardy120 Hanover Sq.LondonWA1 1DPUK  
        
          5Berglunds snabbköpChristina BerglundBerguvsvägen 8LuleåS-958 22Sweden  
        
          6Blauer See DelikatessenHanna MoosForsterstr. 57Mannheim68306Germany  
          
          7Blondel père et filsFrédérique Citeaux24, place KléberStrasbourg67000France  
        
          8Bólido Comidas preparadasMartín SommerC/ Araquil, 67Madrid28023Spain  
        
          9Bon app'Laurence Lebihans12, rue des BouchersMarseille13008France  
        
          10Bottom-Dollar MarketseElizabeth Lincoln23 Tsawassen Blvd.TsawassenT2F 8M4Canada  
        
          11B's BeveragesVictoria AshworthFauntleroy CircusLondonEC2 5NTUK  
        
          12Cactus Comidas para llevarPatricio SimpsonCerrito 333Buenos Aires1010Argentina  
        
          13Centro comercial MoctezumaFrancisco ChangSierras de Granada 9993México D.F.05022Mexico  
          14Chop-suey ChineseYang WangHauptstr. 29Bern3012Switzerland
        15Comércio MineiroPedro AfonsoAv. dos Lusíadas, 23São Paulo05432-043Brazil
        16Consolidated HoldingsElizabeth BrownBerkeley Gardens 12 BreweryLondonWX1 6LTUK  
        
          17Drachenblut DelikatessendSven OttliebWalserweg 21Aachen52066Germany  
        
          18Du monde entierJanine Labrune67, rue des Cinquante OtagesNantes44000France  
        19Eastern ConnectionAnn Devon35 King GeorgeLondonWX3 6FWUK  
        
         20   Ernst Handel   Roland Mendel   Kirchgasse 6   Graz   8010   Austria
         21   Familia Arquibaldo   Aria Cruz   Rua Orós, 92   São Paulo   05442-030   Brazil
         22   FISSA Fabrica Inter. Salchichas S.A.   Diego Roel   C/ Moralzarzal, 86   Madrid   28034   Spain
         23   Folies gourmandes   Martine Rancé   184, chaussée de Tournai   Lille   59000   France
         24   Folk och fä HB   Maria Larsson   Åkergatan 24   Bräcke   S-844 67   Sweden
         25   Frankenversand   Peter Franken   Berliner Platz 43   München   80805   Germany
         26   France restauration   Carine Schmitt   54, rue Royale   Nantes   44000   France
         27   Franchi S.p.A.   Paolo Accorti   Via Monte Bianco 34   Torino   10100   Italy
         28  Furia Bacalhau e Frutos do Mar  Lino Rodriguez  Jardim das rosas n. 32  Lisboa  1675  Portugal
        29  Galería del gastrónomo  Eduardo Saavedra  Rambla de Cataluña, 23  Barcelona  08022  Spain
        30  Godos Cocina Típica  José Pedro Freyre  C/ Romero, 33  Sevilla  41101  Spain
        31  Gourmet Lanchonetes  André Fonseca  Av. Brasil, 442  Campinas  04876-786  Brazil
        32  Great Lakes Food Market  Howard Snyder  2732 Baker Blvd.  Eugene  97403  USA
        33  GROSELLA-Restaurante  Manuel Pereira  5ª Ave. Los Palos Grandes  Caracas  1081  Venezuela
        34  Hanari Carnes  Mario Pontes  Rua do Paço, 67  Rio de Janeiro  05454-876  Brazil
        35  HILARIÓN-Abastos  Carlos Hernández  Carrera 22 con Ave. Carlos Soublette #8-35  San Cristóbal  5022  Venezuela
        36  Hungry Coyote Import Store  Yoshi Latimer  City Center Plaza 516 Main St.  Elgin  97827  USA
        37  Hungry Owl All-Night Grocers  Patricia McKenna  8 Johnstown Road  Cork    Ireland
        38  Island Trading  Helen Bennett  Garden House Crowther Way  Cowes  PO31 7PJ  UK
        39  Königlich Essen  Philip Cramer  Maubelstr. 90  Brandenburg  14776  Germany
        40  La corne d'abondance  Daniel Tonini  67, avenue de l'Europe  Versailles  78000  France
        41  La maison d'Asie  Annette Roulet  1 rue Alsace-Lorraine  Toulouse  31000  France
        42  Laughing Bacchus Wine Cellars  Yoshi Tannamuri  1900 Oak St.  Vancouver  V3F 2K1  Canada
        43  Lazy K Kountry Store  John Steel  12 Orchestra Terrace  Walla Walla  99362  USA
        44  Lehmanns Marktstand  Renate Messner  Magazinweg 7  Frankfurt a.M.   60528  Germany
        45  Let's Stop N Shop  Jaime Yorres  87 Polk St. Suite 5  San Francisco  94117  USA
        46  LILA-Supermercado  Carlos González  Carrera 52 con Ave. Bolívar #65-98 Llano Largo  Barquisimeto  3508  Venezuela
        47  LINO-Delicateses  Felipe Izquierdo  Ave. 5 de Mayo Porlamar  I. de Margarita  4980  Venezuela
        48  Lonesome Pine Restaurant  Fran Wilson  89 Chiaroscuro Rd.  Portland  97219  USA
        49  Magazzini Alimentari Riuniti  Giovanni Rovelli  Via Ludovico il Moro 22  Bergamo  24100  Italy
        50  Maison Dewey  Catherine Dewey  Rue Joseph-Bens 532  Bruxelles  B-1180  Belgium
        51  Mère Paillarde  Jean Fresnière  43 rue St. Laurent  Montréal  H1J 1C3  Canada
        52  Morgenstern Gesundkost  Alexander Feuer  Heerstr. 22  Leipzig  04179  Germany
        53  North/South  Simon Crowther  South House 300 Queensbridge  London  SW7 1RZ  UK
        54  Océano Atlántico Ltda.  Yvonne Moncada  Ing. Gustavo Moncada 8585 Piso 20-A  Buenos Aires  1010  Argentina
        55  Old World Delicatessen  Rene Phillips  2743 Bering St.  Anchorage  99508  USA
        56  Ottilies Käseladen  Henriette Pfalzheim  Mehrheimerstr. 369  Köln  50739  Germany
        57  Paris spécialités  Marie Bertrand  265, boulevard Charonne  Paris  75012  France
        58  Pericles Comidas clásicas  Guillermo Fernández  Calle Dr. Jorge Cash 321  México D.F.  05033  Mexico
        59  Piccolo und mehr  Georg Pipps  Geislweg 14  Salzburg  5020  Austria
        60  Princesa Isabel Vinhoss  Isabel de Castro  Estrada da saúde n. 58  Lisboa  1756  Portugal
        61  Que Delícia  Bernardo Batista  Rua da Panificadora, 12  Rio de Janeiro  02389-673  Brazil
        62  Queen Cozinha  Lúcia Carvalho  Alameda dos Canàrios, 891  São Paulo  05487-020  Brazil
        63  QUICK-Stop  Horst Kloss  Taucherstraße 10  Cunewalde  01307  Germany
        64  Rancho grande  Sergio Gutiérrez  Av. del Libertador 900  Buenos Aires  1010  Argentina
        65  Rattlesnake Canyon Grocery  Paula Wilson  2817 Milton Dr.  Albuquerque  87110  USA
        66  Reggiani Caseifici  Maurizio Moroni  Strada Provinciale 124  Reggio Emilia  42100  Italy
        67  Ricardo Adocicados  Janete Limeira  Av. Copacabana, 267  Rio de Janeiro  02389-890  Brazil
        68  Richter Supermarkt  Michael Holz  Grenzacherweg 237  Genève  1203  Switzerland
        69  Romero y tomillo  Alejandra Camino  Gran Vía, 1  Madrid  28001  Spain
        70  Santé Gourmet  Jonas Bergulfsen  Erling Skakkes gate 78  Stavern  4110  Norway
        71  Save-a-lot Markets  Jose Pavarotti  187 Suffolk Ln.  Boise  83720  USA
        72  Seven Seas Imports  Hari Kumar  90 Wadhurst Rd.  London  OX15 4NB  UK
        73  Simons bistro  Jytte Petersen  Vinbæltet 34  København  1734  Denmark
        74  Spécialités du monde  Dominique Perrier  25, rue Lauriston  Paris  75016  France
        75  Split Rail Beer & Ale  Art Braunschweiger  P.O. Box 555  Lander  82520  USA
        76  Suprêmes délices  Pascale Cartrain  Boulevard Tirou, 255  Charleroi  B-6000  Belgium
        77  The Big Cheese  Liz Nixon  89 Jefferson Way Suite 2  Portland  97201  USA
        78  The Cracker Box  Liu Wong  55 Grizzly Peak Rd.  Butte  59801  USA
        79  Toms Spezialitäten  Karin Josephs  Luisenstr. 48  Münster  44087  Germany
        80  Tortuga Restaurante  Miguel Angel Paolino  Avda. Azteca 123  México D.F.  05033  Mexico
        81  Tradição Hipermercados  Anabela Domingues  Av. Inês de Castro, 414  São Paulo  05634-030  Brazil
        82  Trail's Head Gourmet Provisioners  Helvetius Nagy  722 DaVinci Blvd.  Kirkland  98034  USA
        83  Vaffeljernet  Palle Ibsen  Smagsløget 45  Århus  8200  Denmark
        84  Victuailles en stock  Mary Saveley  2, rue du Commerce  Lyon  69004  France
        85  Vins et alcools Chevalier  Paul Henriot  59 rue de l'Abbaye  Reims  51100  France
        86  Die Wandernde Kuh  Rita Müller  Adenauerallee 900  Stuttgart  70563  Germany
        87  Wartian Herkku  Pirkko Koskitalo  Torikatu 38  Oulu  90110  Finland
        88  Wellington Importadora  Paula Parente  Rua do Mercado, 12  Resende  08737-363  Brazil
        89  White Clover Markets  Karl Jablonski  305 - 14th Ave. S. Suite 3B  Seattle  98128  USA
        90  Wilman Kala  Matti Karttunen  Keskuskatu 45  Helsinki  21240  Finland
        91  Wolski  Zbyszek  ul. Filtrowa 68  Walla  01-012  Poland
          
      AND Example
      The following SQL statement selects all fields from "Customers" where country is "Germany" AND city is "Berlin":
      Example
       SELECT * FROM Customers
       WHERE Country='Germany' AND City='Berlin';
      Try it Yourself »
      OR Example
      The following SQL statement selects all fields from "Customers" where city is "Berlin" OR "München":
      Example
       SELECT * FROM Customers
       WHERE City='Berlin' OR City='München';
      Try it Yourself »
      The following SQL statement selects all fields from "Customers" where country is "Germany" OR "Spain":
      Example
       SELECT * FROM Customers
       WHERE Country='Germany' OR Country='Spain';
      Try it Yourself »
      NOT Example
      The following SQL statement selects all fields from "Customers" where country is NOT "Germany":
      Example
       SELECT * FROM Customers
       WHERE   NOT Country='Germany';
      Try it Yourself »
      Combining AND, OR and NOT
      You can also combine the AND, OR and NOT operators.
      The following SQL statement selects all fields from "Customers" where country is "Germany" AND city must be "Berlin" OR "München" (use parenthesis to form complex expressions):
      Example
       SELECT * FROM Customers
       WHERE Country='Germany' AND (City='Berlin' OR City='München');
      Try it Yourself »
      The following SQL statement selects all fields from "Customers" where country is NOT "Germany" and NOT "USA":
      Example
       SELECT * FROM Customers
       WHERE NOT Country='Germany' AND NOT Country='USA';
      Try it Yourself »
      Test Yourself With Exercises
      Exercise:
      Select all records where the City column has the value 'Berlin' and the PostalCode column has the value 12209.
       * FROM Customers City = 'Berlin'  = 12209;

      Start the Exercise

      ❮ PreviousNext ❯
          3. 
http://www.mh8dociw.tw |

http://m.mh8dociw.tw |

http://wap.mh8dociw.tw |

http://3g.mh8dociw.tw |

http://4g.mh8dociw.tw |

http://5g.mh8dociw.tw |

http://mobile.mh8dociw.tw |

http://vip.mh8dociw.tw |

http://ios.mh8dociw.tw |

http://anzhuo.mh8dociw.tw |

http://d7f97.mh8dociw.tw |

http://b32bc6.mh8dociw.tw |

http://0d4b59.mh8dociw.tw |

http://2a.mh8dociw.tw |

http://1f53e.mh8dociw.tw |

http://aa8.mh8dociw.tw |

在线a视频网站导航