UNION ALL SELECT column_name(s) FROM table_name2 UPDATE UPDATE table_name SET column1=value, column2=value,... WHERE some_column=some_value WHERE SELECT column_name(s) FROM table_name WHERE column_name operator valueSource : http://www.w3schools.com/sql/sql_quickref.asp«...
To create a new table in a database To insert data into a table To join a table To delete a table from a databaseSubmit Answer » What is an Exercise? Test what you learned in the chapter: SQL Create Table by completing 5 relevant exercises. To try more SQL Exercises please visit...
如果你需要更详细的指导或示例,可以参考相关的SQL教程或文档,如[SQL 教程](https://www.w3schools.com/sql/)。
CREATE TABLE Persons ( Personid int NOT NULL AUTO_INCREMENT, LastName varchar(255) NOT NULL, FirstName varchar(255), Age int, PRIMARY KEY (Personid) ); MySQL 使用 AUTO_INCREMENT 关键字来执行 auto-increment 任务。默认地,AUTO_INCREMENT 的开始值是 1,每条新记录递增 1。
DELETE - 从数据库中删除数据 INSERT INTO - 向数据库中插入新数据 CREATE DATABASE - 创建新数据库 ALTER DATABASE - 修改数据库 CREATE TABLE - 创建新表 ALTER TABLE - 变更(改变)数据库表 DROP TABLE - 删除表 CREATE INDEX - 创建索引(搜索键) DROP INDEX - 删除索引 ❮...
I can even create complete websites for you based on your input, so what are you waiting for? Super Simple to Share Host and Publish Websites in no time Included for free in all plans W3Schools subdomain, hosting, and SSL certificate. ...
CREATE DATABASE CREATE DATABASE database_name CREATE TABLE CREATE TABLE table_name(column_name1 data_type,column_name2 data_type,column_name3 data_type,...) CREATE INDEX CREATE INDEX index_nameON table_name (column_name) or CREATE UNIQUE INDEX index_nameON table_name (column_name) CREATE...
UPDATEUPDATE table_name SET column1=value, column2=value,... WHERE some_column=some_value WHERESELECT column_name(s) FROM table_name WHERE column_name operator value Source : https://www.w3schools.com/sql/sql_quickref.asp Track your progress - it's free!
« W3Schools Home Next Chapter » SQL SQL is a standard language for accessing databases. Our SQL tutorial will teach you how to use SQL to access and manipulate data in: MySQL, SQL Server, Access, Oracle, Sybase, DB2, and other database systems....
You answered: True Correct Answer! 24. Which operator is used to search for a specified pattern in a column? You answered: LIKE Correct Answer! 25. Which SQL statement is used to create a table in a database? You answered: CREATE TABLE Correct Answer!分类...