In this Laravel course, we will learn about the Laravel Query Builder Join and Union statement.
The Laravel query builder join and union statements are used to combine data from two or more tables. Also they are used to combine the results of two queries into a single result set.
The query builder uses a left join when the data in both tables is related. A right join is used when the data in one table is related, but not in the other.
The query builder uses a union statement to combine all records from two or more select queries into a single result set.
The syntax for a Laravel Query Builder Join statement is as follows:
$query->leftJoin($table, $on, $where)
$query->rightJoin($table, $on, $where)
$query->innerJoin($table1, $on1, $table2, $on2)
$query->fullOuterJoin($table1, $table2)
Laravel union query builder is a simple syntax which is used to combine the results of two or more queries into one result set.
The syntax for Laravel union query builder can be written as follows:
SELECT * FROM table1 UNION SELECT * FROM table2
WHERE condition1 AND condition2
Laravel join and union query builder is a powerful tool for accessing data from multiple tables. It is the first step in order to create complex queries. It makes it easy to access data from multiple tables, so you can create complex queries.
They are a very useful tool for developers to generate complex queries. Join and Union are two different but complementary, it is easy for developers to use them in the Laravel query builder.
The advantages of using Laravel join and union query builder are:
- Developers can easily generate complex queries;
- It can be used to obtain data from a variety of sources;
- It can be used to combine data from multiple tables;
- It is faster than writing SQL queries by hand.
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