1996年9月18日 · SQL JOIN. A JOIN clause is used to combine rows from two or more tables, based on a related column between them. Let's look at a selection from the "Orders" table:

SQL is a standard language for storing, manipulating and retrieving data in databases. Our SQL tutorial will teach you how to use SQL in: MySQL, SQL Server, MS Access, Oracle, Sybase, Informix, Postgres, and other database systems.

INNER is the default join type for JOIN, so when you write JOIN the parser actually writes INNER JOIN.

1996年9月18日 · MySQL Joining Tables. A JOIN clause is used to combine rows from two or more tables, based on a related column between them. Let's look at a selection from the "Orders" table:

SQL Statement: SELECT Orders.OrderID, Customers.CustomerName, Orders.OrderDate FROM Orders INNER JOIN Customers ON Orders.CustomerID=Customers.CustomerID; Edit the SQL Statement, and click "Run SQL" to see the result.

JOIN. A JOIN clause is used to combine rows from two or more tables, based on a related column between them. Let's look at a selection from the products table:

What is SQL? SQL stands for Structured Query Language; SQL lets you access and manipulate databases; SQL became a standard of the American National Standards Institute (ANSI) in 1986, and of the International Organization for Standardization (ISO) in 1987

Get your own SQL server SQL Statement: SELECT Products.ProductID, Products.ProductName, Categories.CategoryName FROM Products JOIN Categories ON Products.CategoryID = Categories.CategoryID;

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W3Schools has created an SQL database in your browser. The menu to the right displays the database, and will reflect any changes. Feel free to experiment with any SQL statement.