/*****************************************/
/*创建数据表格过程*/
/*****************************************/
/*Phase 1*/
use test;
create table customer(
customer_id int,
customer_name char(20),
customer_street char(30),
customer_city char(30),
primary key(customer_id)
);
/*下面是针对MySQL相关的应用内容*/
/*Phase 2*/
create table test.branch(
branch_id int,
branch_name char(15),
branch_city char(30),
assets numeric(16,2),
primary key(branch_id)
);
/*Phase 3*/
create table test.account(
account_id int,
account_number char(10),
account_name char(15),
balance numeric(12,2),
primary key(account_id)
);
/*Phase 4*/
create table test.depositor(
customer_id int,
customer_name char(20),
customer_number char(10),
primary key(customer_id)
);
/*Test 1
测试create建表和delete销毁
*/
/*Step 1*/
create table test.testTable(
id int,
name char(20),
primary key(id)
);
/*Step 2*/
/*下面两种方式是一样的，也即，MySQL不区分大小写*/
insert into test.testTable values(1, "boss");
/*insert into test.testtable values(1, "boss");*/
/*Step 3*/
-- 获取表内数据
select * from test.testTable;
/*Step 4*/
-- 删除表格及其表格内部关系
drop table test.testTable;
/*Step 5*/
/*这里需要对MySQL的删除更新做相应的设置
错误提示如下：
0 21:38:10 delete from test.testTable Error Code: 1175.
You are using safe update mode and you tried to update a table
without a WHERE that uses a KEY column To disable safe mode,
toggle the option in Preferences -> SQL Editor -> Query Editor and reconnect.
*/
SET SQL_SAFE_UPDATES = 0;
-- 删除表格内容
delete from test.testTable;
/*测试alter table r add A D*/
# Step 1
create table test.alterTable(
T_id int,
T_name char(30),
primary key(T_id)
);
#注意创建过程需要时间，因此插入过程需要停等。
# Step 2
insert into test.alterTable values(1, "Boy", "boy");
# Step 3
select * from test.alterTable;
# Step 4
drop table test.alterTable;
# Step 5
-- 添加一列
alter table test.alterTable add sex char(10);
# Step 6
-- 查询结果
select * from test.alterTable;
# Step 7
-- 添加数据
insert into test.alterTable values(1, "Boy", "boy");
# Step 8
-- 查询结果
select * from test.alterTable;
# Step 9
-- 删除一列
alter table test.alterTable drop sex;
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