Oracle SQL语句之UPDATE

ELECT - All columns

Return all columns.

SELECT    *  FROM COURSES

SELECT - Return first 10 rows

Run a SQL Select statement and limit the number of rows returned. Useful when you are not sure of how to limit the recordset to be returned and you only want to return a few rows to do some initial analysis.

SELECT   COURSE_DESIGNATER ,   COURSE_NAME       ,   EMPLOYEE_INACTIVATING FROM COURSESWHERE RowNum < 11 

SELECT - Count rows in table

Returns a count of the total number of rows in a table.

SELECT COUNT(*) from COURSES

SELECT - Joining tables

Join two Oracle tables together.

SELECT         b.COURSE_NAME        ,       a.CLASS_END_DATE     ,        a.CLASS_START_DATE                          FROM         CLASSES a         JOIN COURSES b              ON  b.COURSE_DESIGNATER = a.COURSE_DESIGNATER_FKWHERE  RowNum < 100 / 

UPDATE - Single row

Update a single row of data.

UPDATE STUDENTSSET           EMPLOYEE_ID_FK       = '3789'  ,       GENDER_CODE          = 'F'  ,       MARITAL_STATUS_CODE  = 'M'  WHERE  STUDENT_ID = 11  /COMMIT WORK ;/

UPDATE - Update multiple rows
Update multiple rows of data..
UPDATE CLASSCONVENINGSSET    ACITVE_FLG  = 2WHERE     CLASS_CONVENE_DATE = TO_DATE('2005-12-31 00:00:00',     'YYYY-MM-DD HH24:MI:SS') /COMMIT WORK ;/
Oracle SQL INSERT Example
INSERT - Row
Insert a row of data. Note: the minimum requirements for and insert must include columns that are part of the primary key, part of indexes where no duplicates are allowed, and all columns that cannot be null.
INSERT INTO COURSES     (        COURSE_DESIGNATER           ,        COURSE_NAME                 ,        EDUCATION_DELIVERY_METHOD   ,        COURSE_DESCRIPTION_SHORT    ,        COURSE_DESCRIPTION_LONG     ,        COURSE_SYLLABUS_ATTACHMENT  ,        COURSE_MATERIALS_ZIP        ,        COURSE_MATERIALS_LOCATION   ,        MAX_RECOMMENDED_ENROLLMENT  ,        CONVENINGS                  ,        CONVENINGS_DETAILS          ,        CONVENINGS_CONSECUTIVE_FLG  ,        TYPICAL_PRECLASS_PREP_TIME  ,        TYPICAL_POSTCLASS_PREP_TIME ,        TYPICAL_CONVENING_TIME      ,        SPONSER_NAME                ,        ACTIVE_FLG                  ,        INACTIVE_DATE               ,        INACTIVE_REASON             ,        EMPLOYEE_INACTIVATING            ) VALUES     (        'SQL200' ,         'Intermediate SQL' ,         'Classroom' ,         NULL ,         NULL ,         'doc' ,         'zip' ,         'DataExpressions\csematerials' ,         16 ,         0 ,         NULL ,         0 ,         NULL ,         NULL ,         NULL ,         NULL ,         1 ,         NULL ,         NULL ,         0      ) /COMMIT WORK ;
Oracle SQL DELETE Examples
DELETE - Row
Delete a row of data. 
DELETE FROM COURSESWHERE  COURSE_DESIGNATER = 'Java110' /COMMIT WORK ;
DELETE - Multiple rows of data
Delete multiple rows of data. Be careful!
DELETE FROM CLASSCONVENINGSWHERE      CLASSES_NUM_FK      > 4    AND CLASS_CONVENE_DATE = TO_DATE('2006-02-15 00:00:00',                                    'YYYY-MM-DD HH24:MI:SS')   AND CLASS_LOCATION_FK   = 'Seattle-Training Room 1

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