Oracle数据库删除语句DELETE的一般性用法

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-

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)