SQL239. 将titles_test表名修改为titles_2017
描述
将titles_test表名修改为titles_2017。CREATE TABLE IF NOT EXISTS titles_test (
id int(11) not null primary key,
emp_no int(11) NOT NULL,
title varchar(50) NOT NULL,
from_date date NOT NULL,
to_date date DEFAULT NULL);
insert into titles_test values ('1', '10001', 'Senior Engineer', '1986-06-26', '9999-01-01'),
('2', '10002', 'Staff', '1996-08-03', '9999-01-01'),
('3', '10003', 'Senior Engineer', '1995-12-03', '9999-01-01'),
('4', '10004', 'Senior Engineer', '1995-12-03', '9999-01-01'),
('5', '10001', 'Senior Engineer', '1986-06-26', '9999-01-01'),
('6', '10002', 'Staff', '1996-08-03', '9999-01-01'),
('7', '10003', 'Senior Engineer', '1995-12-03', '9999-01-01'); 示例1
输入:
drop table if exists titles_test;
drop table if exists titles_2017;
CREATE TABLE titles_test (
id int(11) not null primary key,
emp_no int(11) NOT NULL,
title varchar(50) NOT NULL,
from_date date NOT NULL,
to_date date DEFAULT NULL);
insert into titles_test values
('1', '10001', 'Senior Engineer', '1986-06-26', '9999-01-01'),
('2', '10002', 'Staff', '1996-08-03', '9999-01-01'),
('3', '10003', 'Senior Engineer', '1995-12-03', '9999-01-01'),
('4', '10004', 'Senior Engineer', '1995-12-03', '9999-01-01'),
('5', '10001', 'Senior Engineer', '1986-06-26', '9999-01-01'),
('6', '10002', 'Staff', '1996-08-03', '9999-01-01'),
('7', '10003', 'Senior Engineer', '1995-12-03', '9999-01-01');
输出:
1|10001|Senior Engineer|1986-06-26|9999-01-01 2|10002|Staff|1996-08-03|9999-01-01 3|10003|Senior Engineer|1995-12-03|9999-01-01 4|10004|Senior Engineer|1995-12-03|9999-01-01 5|10001|Senior Engineer|1986-06-26|9999-01-01 6|10002|Staff|1996-08-03|9999-01-01 7|10003|Senior Engineer|1995-12-03|9999-01-01
Sqlite 解法, 执行用时: 10ms, 内存消耗: 3196KB, 提交时间: 2020-07-07
alter table titles_test rename to titles_2017;
Sqlite 解法, 执行用时: 10ms, 内存消耗: 3232KB, 提交时间: 2021-07-22
ALTER TABLE titles_test RENAME TO titles_2017;
Sqlite 解法, 执行用时: 10ms, 内存消耗: 3320KB, 提交时间: 2021-06-23
create table titles_2017 as select *from titles_test; drop table titles_test;
Sqlite 解法, 执行用时: 10ms, 内存消耗: 3320KB, 提交时间: 2020-11-23
alter table titles_test rename to titles_2017
Sqlite 解法, 执行用时: 10ms, 内存消耗: 3320KB, 提交时间: 2020-11-23
alter table titles_test rename to titles_2017