導(dǎo)讀:1建站知識(shí)這篇文章主要通過實(shí)例簡(jiǎn)要介紹case函數(shù)的用法，學(xué)習(xí)oracle的朋友可以參考下營(yíng)銷型網(wǎng)站建設(shè)百度seo網(wǎng)站優(yōu)化。

1.創(chuàng)建測(cè)試表:

復(fù)制代碼 代碼如下:

DROP SEQUENCE student_sequence;CREATE SEQUENCE student_sequence  START WITH 10000  INCREMENT BY 1;

DROP TAB網(wǎng)站seo優(yōu)化軟件LE students;CREATE TABLE students (  id               NUMBER(5) PRIMARY KEY,  first_name       VARCHAR2(20),  last_name        VARCHAR2(20),  major            VARCHAR2(30),  current_credits  NUMBER(3),  grade     varchar2(2));

INSERT INTO students (id, first_name, last_name, major, current_credits,grade)  VALUES (student_sequence.NEXTVAL, 'Scott', 'Smith', 'Computer Science', 98,null);

INSERT INTO students (id, first_name, last_name, major, current_credits,grade)  VALUES (student_sequence.NEXTVAL, 'Margaret', 'Mason', 'History', 88,null);

INSERT INTO students (id, first_name, last_name, major, current_credits,grade)  VALUES (student_sequence.NEXTVAL, 'Joanne', 'Junebug', 'Computer Science', 75,null);

INSERT INTO students (id, first_name, last_name, major, current_credits,grade)  VALUES (student_sequence.NEXTVAL, 'Manish', 'Murgratroid', 'Economics', 66,null);

commit;

2.查看相應(yīng)數(shù)據(jù)

復(fù)制代碼 代碼如下:

SQL> select * from students;

        ID FIRST_NAME      &nseo網(wǎng)站優(yōu)化bsp;    LAST_NAME            MAJOR                          CURRENT_CREDITS GR---------- -------------------- -------------------- ------------------------------ --------------- --     10000 Scott                Smith                Computer Science                            98     10001 Margaret             Mason                History                                     88     10002 Joanne               Junebug              Computer Science                            75     10003 Manish               Murgratroid          Economics                                   66

關(guān)鍵詞標(biāo)簽: 標(biāo)簽 函數(shù)