What is LEFT OUTER JOIN in MySQL?
MySQL Left Join. MySQL Left Join or Left outer join is used to return all the records (or rows) from Left table, and matching rows from the right table.
What are the types of join in SQL?
There are 2 types of SQL JOINS – INNER JOINS and OUTER JOINS. If you don’t put INNER or OUTER keywords in front of the SQL JOIN keyword, then INNER JOIN is used. In short “INNER JOIN” = “JOIN” (note that different databases have different syntax for their JOIN clauses). The INNER JOIN will select…
What is left join in SQL?
LEFT JOIN. The SQL LEFT JOIN (specified with the keywords LEFT JOIN and ON) joins two tables and fetches all matching rows of two tables for which the SQL-expression is true, plus rows from the frist table that do not match any row in the second table.
How do you join two tables in SQL?
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: Then, look at a selection from the “Customers” table: Notice that the “CustomerID” column in the “Orders” table refers to the “CustomerID” in the “Customers” table.
What is cross join in MySQL?
Cross Join. In MySQL, the CROSS JOIN produced a result set which is the product of rows of two associated tables when no WHERE clause is used with CROSS JOIN. In this join, the result set appeared by multiplying each row of the first table with all rows in the second table if no condition introduced with CROSS JOIN.
How does SQL join works?
JOIN returns all rows from tables where the key record of one table is equal to the key records of another table. The INNER JOIN selects all rows from both participating tables as long as there is a match between the columns. An SQL INNER JOIN is same as JOIN clause , combining rows from two or more tables.