從網(wǎng)上找了一些習(xí)題，下面結(jié)合網(wǎng)友的建表SQL語句及workbench的使用，將過程分享一下
第一步：建test數(shù)據(jù)庫，全過程與前一篇過程一樣，不再進(jìn)行說明
第二步：建表，共student,course,score,teacher,grade四張表
網(wǎng)友提供的表結(jié)構(gòu)如下所示
CREATE TABLE STUDENT
(SNO VARCHAR(3) NOT NULL,
SNAME VARCHAR(4) NOT NULL,
SSEX VARCHAR(2) NOT NULL,
SBIRTHDAY DATETIME,
CLASS VARCHAR(5))
CREATE TABLE COURSE
(CNO VARCHAR(5) NOT NULL,
CNAME VARCHAR(10) NOT NULL,
TNO VARCHAR(10) NOT NULL)
CREATE TABLE SCORE
(SNO VARCHAR(3) NOT NULL,
CNO VARCHAR(5) NOT NULL,
DEGREE NUMERIC(10, 1) NOT NULL)
NUMERIC即為DECIMAL
CREATE TABLE TEACHER
(TNO VARCHAR(3) NOT NULL,
TNAME VARCHAR(4) NOT NULL, TSEX VARCHAR(2) NOT NULL,
TBIRTHDAY DATETIME NOT NULL, PROF VARCHAR(6),
DEPART VARCHAR(10) NOT NULL)
create table grade(low? number(3,0),upp? number(3),rank? char(1));
NUMBER即為DECIMAL
以student表舉例，輸入字段名稱，點(diǎn)選數(shù)據(jù)類型即可
自動(dòng)彈出SQL語句，后期如熟練可自行寫好SQL語句后執(zhí)行
第三步：錄入數(shù)據(jù)
正常來講，點(diǎn)擊表名稱后面的表格圖標(biāo)后，出現(xiàn)的界面是可以直接填寫數(shù)據(jù)的，但此次點(diǎn)擊后并沒有出現(xiàn)能夠填寫的表格
經(jīng)查找問題后，發(fā)現(xiàn)是因?yàn)榇吮頉]有設(shè)置primary key，在將每個(gè)表的唯一字段（如無唯一字段，可單獨(dú)設(shè)置一個(gè)序號字段）設(shè)置了primary key后，可正常進(jìn)行數(shù)據(jù)錄入
數(shù)據(jù)很多，一個(gè)一個(gè)錄入很麻煩，我們可以添加一個(gè)SQL表進(jìn)行錄入
下面是也好的insert語句，將語句復(fù)制到軟件中出現(xiàn)了報(bào)錯(cuò)
明明剛才用的是test數(shù)據(jù)庫，為什么報(bào)錯(cuò)顯示world.student不存在呢，經(jīng)過排查，發(fā)現(xiàn)在建立test數(shù)據(jù)庫后，我沒有把它設(shè)置成默認(rèn)數(shù)據(jù)庫，于是我要設(shè)置一下
發(fā)現(xiàn)仍然報(bào)錯(cuò)，這回我將日期字段加了引號，于是數(shù)據(jù)錄入成功
INSERT INTO STUDENT (SNO,SNAME,SSEX,SBIRTHDAY,CLASS) VALUES (108 ,'曾華'
,'男' ,'1977-09-01',95033);
INSERT INTO STUDENT (SNO,SNAME,SSEX,SBIRTHDAY,CLASS) VALUES (105 ,'匡明'
,'男' ,'1975-10-02',95031);
INSERT INTO STUDENT (SNO,SNAME,SSEX,SBIRTHDAY,CLASS) VALUES (107 ,'王麗'
,'女' ,'1976-01-23',95033);
INSERT INTO STUDENT (SNO,SNAME,SSEX,SBIRTHDAY,CLASS) VALUES (101 ,'李軍'
,'男' ,'1976-02-20',95033);
INSERT INTO STUDENT (SNO,SNAME,SSEX,SBIRTHDAY,CLASS) VALUES (109 ,'王芳'
,'女' ,'1975-02-10',95031);
INSERT INTO STUDENT (SNO,SNAME,SSEX,SBIRTHDAY,CLASS) VALUES (103 ,'陸君'
,'男' ,'1974-06-03',95031);
INSERT INTO COURSE(CNO,CNAME,TNO)VALUES ('3-105' ,'計(jì)算機(jī)導(dǎo)論',825)
INSERT INTO COURSE(CNO,CNAME,TNO)VALUES ('3-245' ,'操作系統(tǒng)' ,804);
INSERT INTO COURSE(CNO,CNAME,TNO)VALUES ('6-166' ,'數(shù)據(jù)電路' ,856);
INSERT INTO COURSE(CNO,CNAME,TNO)VALUES ('9-888' ,'高等數(shù)學(xué)' ,100);
INSERT INTO SCORE(SNO,CNO,DEGREE)VALUES (103,'3-245',86);
INSERT INTO SCORE(SNO,CNO,DEGREE)VALUES (105,'3-245',75);
INSERT INTO SCORE(SNO,CNO,DEGREE)VALUES (109,'3-245',68);
INSERT INTO SCORE(SNO,CNO,DEGREE)VALUES (103,'3-105',92);
INSERT INTO SCORE(SNO,CNO,DEGREE)VALUES (105,'3-105',88);
INSERT INTO SCORE(SNO,CNO,DEGREE)VALUES (109,'3-105',76);
INSERT INTO SCORE(SNO,CNO,DEGREE)VALUES (101,'3-105',64);
INSERT INTO SCORE(SNO,CNO,DEGREE)VALUES (107,'3-105',91);
INSERT INTO SCORE(SNO,CNO,DEGREE)VALUES (108,'3-105',78);
INSERT INTO SCORE(SNO,CNO,DEGREE)VALUES (101,'6-166',85);
INSERT INTO SCORE(SNO,CNO,DEGREE)VALUES (107,'6-106',79);
INSERT INTO SCORE(SNO,CNO,DEGREE)VALUES (108,'6-166',81);
INSERT INTO TEACHER(TNO,TNAME,TSEX,TBIRTHDAY,PROF,DEPART)
VALUES (804,'李誠','男','1958-12-02','副教授','計(jì)算機(jī)系');
INSERT INTO TEACHER(TNO,TNAME,TSEX,TBIRTHDAY,PROF,DEPART)
VALUES (856,'張旭','男','1969-03-12','講師','電子工程系');
INSERT INTO TEACHER(TNO,TNAME,TSEX,TBIRTHDAY,PROF,DEPART)
VALUES (825,'王萍','女','1972-05-05','助教','計(jì)算機(jī)系');
INSERT INTO TEACHER(TNO,TNAME,TSEX,TBIRTHDAY,PROF,DEPART)
VALUES (831,'劉冰','女','1977-08-14','助教','電子工程系');
INSERT INTO grade VALUES(90,100,’A’);
INSERT INTO grade VALUES(80,89,’B’);
INSERT INTO grade VALUES(70,79,’C’);
INSERT INTO grade VALUES(60,69,’D’);
INSERT INTO grade VALUES(0,59,’E’);
第四步：致此，數(shù)據(jù)準(zhǔn)備完畢
