SQL系列學習 基礎數據
//班主任表
CREATE TABLE [dbo].[teacher](
[id] [int] IDENTITY(1,1) NOT NULL primary key,
[name] [varchar](50) NOT NULL,
[sj] [datetime] default(getdate()) not NULL
)
//課室表
CREATE TABLE [class](
[id] [int] IDENTITY(1,1) NOT NULL primary key,
[teacherid] [int] NOT NULL,
[name] [varchar](50) NOT NULL,
[sj] [datetime] default(getdate()) not NULL
）
//學員表
CREATE TABLE [dbo].[student](
[id] [int] IDENTITY(1,1) NOT NULL primary,
[classid] [int] NOT NULL,
[name] [varchar](50) NOT NULL,
[sj] [datetime] default(getdate()) not NULL ,
)
//插入班主任表,並獲取對應的班主任ID
DECLARE @t1 int ,@t2 int,@t3 int
INSERT INTO teacher(name) VALUES(‘Teacher Jack‘)
SELECT @t1=IDENT_CURRENT(‘teacher‘)
SELECT @t2=IDENT_CURRENT(‘teacher‘)
INSERT INTO teacher(name) VALUES(‘Teacher Larry‘)
SELECT @t3=IDENT_CURRENT(‘teacher‘)
//插入課室表,並獲取對應課室ID
DECLARE @c1 int ,@c2 int,@c3 int
insert into class(teacherid,name) VALUES(@t1,‘Photography‘)
SELECT @c1=IDENT_CURRENT(‘class‘)
SELECT @c2=IDENT_CURRENT(‘class‘)
insert into class(teacherid,name) VALUES(@t3,‘Chinese‘)
SELECT @c3=IDENT_CURRENT(‘class‘)
//根據課室表,插入學生表
INSERT INTO student(classid,name) VALUES(@c1,‘Harry‘)
INSERT INTO student(classid,name) VALUES(@c1,‘Kate‘)
INSERT INTO student(classid,name) VALUES(@c1,‘Charlotter‘)
INSERT INTO student(classid,name) VALUES(@c1,‘Catherine‘)
INSERT INTO student(classid,name) VALUES(@c2,‘George‘)
INSERT INTO student(classid,name) VALUES(@c2,‘Joe‘)
INSERT INTO student(classid,name) VALUES(@c2,‘Leo‘)
INSERT INTO student(classid,name) VALUES(@c2,‘Kitty‘)
INSERT INTO student(classid,name) VALUES(@c3,‘May‘)
INSERT INTO student(classid,name) VALUES(@c3,‘River‘)
INSERT INTO student(classid,name) VALUES(@c3,‘Holly‘)
INSERT INTO student(classid,name) VALUES(@c3,‘Eden‘)
INSERT INTO student(classid,name) VALUES(@c3,‘Json‘)
INSERT INTO student(classid,name) VALUES(@c3,‘Alina‘)
本篇作為基礎數據，設想是作為一個學習系列，近期也習慣建立基礎數據臨時表作為測試數據，即時刪除，很方便。可以在表名前面加上#，末尾刪除即可；
主要還是記錄自己學習的過程，這些基礎的知識相信園內已經有很多分享，參考了各位的資料，再作為自學的記錄而已，如有差錯，請指正
SQL系列學習 基礎數據