Oracle DELETE删除记录sql语句用法

语法与其它的sql数据库教程是一样的，如下
DELETE FROM COURSES
WHERE COURSE_DESIGNATER = 'Java110'

按条件比较复杂的操作方法

DELETE FROM CLASSCONVENINGS
WHERE      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'

下面来看个详细的实例

SQL> -- create demo table
SQL> create table Employee(
2    ID                 VARCHAR2(4 BYTE)         NOT NULL,
3    First_Name         VARCHAR2(10 BYTE),
4    Last_Name          VARCHAR2(10 BYTE),
5    Start_Date         DATE,
6    End_Date           DATE,
7    Salary             Number(8,2),
8    City               VARCHAR2(10 BYTE),
9    Description        VARCHAR2(15 BYTE)
10 )
11 /

Table created.

SQL>
SQL> -- prepare data
SQL> insert into Employee(ID, First_Name, Last_Name, Start_Date,                     End_Date,                       Salary, City,       Description)
2               values ('01','Jason',    'Martin', to_date('19960725','YYYYMMDD'), to_date('20060725','YYYYMMDD'), 1234.56, 'Toronto', 'Programmer')
3 /

1 row created.

SQL> insert into Employee(ID, First_Name, Last_Name, Start_Date,                     End_Date,                       Salary, City,       Description)
2                values('02','Alison',   'Mathews', to_date('19760321','YYYYMMDD'), to_date('19860221','YYYYMMDD'), 6661.78, 'Vancouver','Tester')
3 /

1 row created.

SQL> insert into Employee(ID, First_Name, Last_Name, Start_Date,                     End_Date,                       Salary, City,       Description)
2                values('03','James',    'Smith',   to_date('19781212','YYYYMMDD'), to_date('19900315','YYYYMMDD'), 6544.78, 'Vancouver','Tester')
3 /

1 row created.

SQL> insert into Employee(ID, First_Name, Last_Name, Start_Date,                     End_Date,                       Salary, City,       Description)
2                values('04','Celia',    'Rice',    to_date('19821024','YYYYMMDD'), to_date('19990421','YYYYMMDD'), 2344.78, 'Vancouver','Manager')
3 /

1 row created.

SQL> insert into Employee(ID, First_Name, Last_Name, Start_Date,                     End_Date,                       Salary, City,       Description)
2                values('05','Robert',   'Black',   to_date('19840115','YYYYMMDD'), to_date('19980808','YYYYMMDD'), 2334.78, 'Vancouver','Tester')
3 /

1 row created.

SQL> insert into Employee(ID, First_Name, Last_Name, Start_Date,                     End_Date,                       Salary, City,        Description)
2                values('06','Linda',    'Green',   to_date('19870730','YYYYMMDD'), to_date('19960104','YYYYMMDD'), 4322.78,'New York', 'Tester')
3 /

1 row created.

SQL> insert into Employee(ID, First_Name, Last_Name, Start_Date,                     End_Date,                       Salary, City,        Description)
2                values('07','David',    'Larry',   to_date('19901231','YYYYMMDD'), to_date('19980212','YYYYMMDD'), 7897.78,'New York', 'Manager')
3 /

1 row created.

SQL> insert into Employee(ID, First_Name, Last_Name, Start_Date,                     End_Date,                       Salary, City,        Description)
2                values('08','James',    'Cat',     to_date('19960917','YYYYMMDD'), to_date('20020415','YYYYMMDD'), 1232.78,'Vancouver', 'Tester')
3 /

1 row created.

SQL>
SQL>
SQL>
SQL> -- display data in the table
SQL> select * from Employee
2 /

ID   FIRST_NAME LAST_NAME START_DAT END_DATE      SALARY CITY       DESCRIPTION
---- ---------- ---------- --------- --------- ---------- ---------- ---------------
01   Jason      Martin     25-JUL-96 25-JUL-06    1234.56 Toronto    Programmer
02   Alison     Mathews    21-MAR-76 21-FEB-86    6661.78 Vancouver Tester
03   James      Smith      12-DEC-78 15-MAR-90    6544.78 Vancouver Tester
04   Celia      Rice       24-OCT-82 21-APR-99    2344.78 Vancouver Manager
05   Robert     Black      15-JAN-84 08-AUG-98    2334.78 Vancouver Tester
06   Linda      Green      30-JUL-87 04-JAN-96    4322.78 New York   Tester
07   David      Larry      31-DEC-90 12-FEB-98    7897.78 New York   Manager

ID   FIRST_NAME LAST_NAME START_DAT END_DATE      SALARY CITY       DESCRIPTION
---- ---------- ---------- --------- --------- ---------- ---------- ---------------
08   James      Cat        17-SEP-96 15-APR-02    1232.78 Vancouver Tester

8 rows selected.

SQL>
SQL>
SQL>
SQL>
SQL>
SQL>
SQL> -- delete command with conditions
SQL>
SQL> delete from Employee where Salary > 3000;

4 rows deleted.

SQL>
SQL> select * from Employee;

ID   FIRST_NAME LAST_NAME START_DAT END_DATE      SALARY CITY       DESCRIPTION
---- ---------- ---------- --------- --------- ---------- ---------- ---------------
01   Jason      Martin     25-JUL-96 25-JUL-06    1234.56 Toronto    Programmer
04   Celia      Rice       24-OCT-82 21-APR-99    2344.78 Vancouver Manager
05   Robert     Black      15-JAN-84 08-AUG-98    2334.78 Vancouver Tester
08   James      Cat        17-SEP-96 15-APR-02    1232.78 Vancouver Tester

4 rows selected.

删除指定的内容

SQL> CREATE TABLE project (
2    pro_id              NUMBER(4),
3    pro_name            VARCHAR2(40),
4    budget          NUMBER(9,2),
5    CONSTRAINT project_pk   PRIMARY KEY (pro_id)
6 );

Table created.

SQL>
SQL>
SQL> INSERT INTO project(pro_id, pro_name, budget)VALUES (1001, 'A',1912000);

1 row created.

SQL> INSERT INTO project(pro_id, pro_name, budget)VALUES (1002, 'ERP',9999999);

1 row created.

SQL> INSERT INTO project(pro_id, pro_name, budget)VALUES (1003, 'SQL',897000);

1 row created.

SQL> INSERT INTO project(pro_id, pro_name, budget)VALUES (1004, 'CRM',294000);

1 row created.

SQL> INSERT INTO project(pro_id, pro_name, budget)VALUES (1005, 'VPN',415000);

1 row created.

SQL>
SQL>
SQL> SET ECHO ON
SQL> DELETE
2 FROM project
3 WHERE pro_id = 1006
4

补充：数据库,Oracle教程