当我们尝试运行上面的代码时,在MySQL 8中会出现如下错误信息:You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'table students ...。这表明MySQL 8不支持create or replace table语法。 为了解决这个问题,我们可以先删...
CREATE TABLE dept( id INT PRIMARY KEY AUTO_INCREMENT, NAME VARCHAR(20) ); INSERT INTO dept (NAME) VALUES ('开发部'),('市场部'),('财务部'); -- 创建员工表 CREATE TABLE emp( id INT PRIMARY KEY AUTO_INCREMENT, NAME VARCHAR(20), gender CHAR(1),-- 性别 salary DOUBLE,-- 工资 join_...
create table test_data(id int primary key auto_increment,name varchar(30)) engine=innodb; insert into test_data values(1,'aa'),(2,'bb'),(3,'cc'); show create table test_data\G Table: test_dataCreate Table: CREATE TABLE `test_data` ( `id` int(11) NOT NULL AUTO_INCREMENT, `na...
CreateTable:CREATETABLE`t` ( `id`int(11)NOTNULL, `num`int(11)DEFAULTNULL,PRIMARYKEY (`id`) ) ENGINE=InnoDBDEFAULTCHARSET=utf8 1 row in set (0.00 sec) mysql> select * from t; Empty set (0.00 sec) mysql> insert intot(id, num)values(1,100); Query OK, 1 row affected (0.02 sec...
(6,3); Query OK, 2 rows affected (0.00 sec) mysql >>select * from test1; +---+---+ | id | age | +---+---+ | 2 | 2 | | 6 | 3 | +---+---+ 2 rows in set (0.00 sec) mysql >>show create table test1\G *** 1. row *** : test1 Create Table: CREATE TABLE...
MySQL中 replace into是否像预期样:若表中有已经存在的数据,则把已经存在的数据删除,插入新数据? 准备数据 CREATETABLE`test_replace` ( `id`int(11)NOTNULLAUTO_INCREMENT, `str1`char(10)DEFAULTNULL, `str2`char(10)DEFAULTNULL,PRIMARYKEY (`id`),UNIQUEKEY `uqx_str` (`str1`) ...
table `test`.`ix` trx id 1866 lock_mode X locks gap before rec insert intention waiting*** (2) TRANSACTION:TRANSACTION 1865, ACTIVE 19 sec insertingmysql tables in use 1, locked 15 lock struct(s), heap size 1136, 5 row lock(s), undo log entries 3MySQL thread id 1156, OS thread ...
地址:https://dev.mysql.com/doc/refman/5.6/en/replace.html b. 问题现象 丢失数据的表结构如下: 复制 CREATETABLE`active_items` (`id`bigint(20)NOTNULLAUTO_INCREMENT COMMENT'主键',`ad_id`char(32)NOTNULLDEFAULT''COMMENT'XXX',`ap_id` tinyint(4)NOTNULLDEFAULT'1'COMMENT'XXX',`price`bigint(...
CREATE TABLE names( id INT(10) PRIMARY KEY AUTO_INCREMENT, name VARCHAR(255) UNIQUE, age INT(10) ) 插入数据 代码语言:javascript 代码运行次数:0 运行 AI代码解释 mysql> insert into names(name, age) values("小明", 24); mysql> insert into names(name, age) values("大红", 24); mysql> ...
1 row in set (0.00 sec) show create table test_data\G Table: test_data Create Table: CREATE TABLE `test_data` ( `id` int(11) NOT NULL AUTO_INCREMENT, `name` varchar(30) DEFAULT NULL, PRIMARY KEY (`id`) ) ENGINE=InnoDB AUTO_INCREMENT=4 DEFAULT CHARSET=utf8 ...