If you need to manually join data with two or more conditions, you can learn how to add multiple conditions in Laravel Eloquent's join query using this post. While you don't need to use it if you're using data
编写的思路,1,先确定所连接的表,2,再确定所要查询的字段,3,确定连接条件以及连接方式 select e.empName,d.deptName from t_employee e INNER JOIN...t_dept d ON e.dept = d.id; 查询的结果如下: 其中,没有部门的人员和部门没有员工的部门都没有被查询出来,这就是内连接的特点,只查询在连接的表中...
1$users = DB::table('users') 2 ->select(DB::raw('count(*) as user_count, status')) 3 ->where('status', '<>', 1) 4 ->groupBy('status') 5 ->get();JoinsInner Join StatementThe query builder may also be used to write join statements. To perform a basic SQL "inner join",...
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To determine the table name of the relationship's intermediate table, Eloquent will join the two related model names in alphabetical order. However, you are free to override this convention. You may do so by passing a second argument to the belongsToMany method:...
Join Clause TheJoinClauseclass has been rewritten to unify its syntax with the query builder. The optional$whereparameter of theonclause has been removed. To add a "where" conditions you should explicitly use one of thewheremethods offered by thequery builder: ...
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Inner Join ClauseThe query builder may also be used to add join clauses to your queries. To perform a basic "inner join", you may use the join method on a query builder instance. The first argument passed to the join method is the name of the table you need to join to, while the...
Arr::crossJoin()The Arr::crossJoin method cross joins the given arrays, returning a Cartesian product with all possible permutations:use Illuminate\Support\Arr; $matrix = Arr::crossJoin([1, 2], ['a', 'b']); /* [ [1, 'a'], [1, 'b'], [2, 'a'], [2, 'b'], ] */ $...