yii2数据条件查询-where专题

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yii2数据条件查询-where专题
条件查询
$customers=Customer::find()->where($cond)->all();
$cond就是我们所谓的条件，条件的写法也根据查询数据的不同存在差异，那么如何用yii2的方式来写查询条件呢？
[[简单条件]]

// SQL: (type = 1) AND (status = 2).$cond = ['type' => 1, 'status' => 2]  // SQL:(id IN (1, 2, 3)) AND (status = 2)$cond = ['id' => [1, 2, 3], 'status' => 2]  //SQL:status IS NULL$cond = ['status' => null]

[[and]]:将不同的条件组合在一起，用法举例：

//SQL:`id=1 AND id=2`$cond = ['and', 'id=1', 'id=2'] //SQL:`type=1 AND (id=1 OR id=2)`$cond = ['and', 'type=1', ['or', 'id=1', 'id=2']] //SQL:`type=1 AND (id=1 OR id=2)` //此写法'='可以换成其他操作符，例：in like != >=等$cond = [    'and',    ['=', 'type', 1],    [        'or',        ['=', 'id', '1'],        ['=', 'id', '2'],    ]]

[[or]]:

//SQL:`(type IN (7, 8, 9) OR (id IN (1, 2, 3)))`$cond = ['or', ['type' => [7, 8, 9]], ['id' => [1, 2, 3]]

[[not]]:

//SQL:`NOT (attribute IS NULL)`$cond = ['not', ['attribute' => null]]

[[between]]: not between 用法相同

//SQL:`id BETWEEN 1 AND 10`$cond = ['between', 'id', 1, 10]

[[in]]: not in 用法类似

   //SQL:`id IN (1, 2, 3)`$cond = ['in', 'id', [1, 2, 3]] or $cond =['id'=>[1, 2, 3]] //IN条件也适用于多字段$cond = ['in', ['id', 'name'], [['id'=> 1, 'name' => 'foo'], ['id' => 2, 'name' => 'bar']]] //也适用于内嵌sql语句$cond = ['in', 'user_id', (newQuery())->select('id')->from('users')->where(['active' => 1])]

[[like]]:

>   //SQL:`name LIKE '%tester%'`$cond = ['like', 'name', 'tester']
> //SQL:`name LIKE '%test%' AND name LIKE '%sample%'`$cond = ['like',
> 'name', ['test', 'sample']] //SQL:`name LIKE '%tester'`$cond =
> ['like', 'name', '%tester', false]

[[exists]]: not exists用法类似

//SQL:EXISTS (SELECT "id" FROM "users" WHERE "active"=1)$cond = ['exists', (new Query())->select('id')->from('users')->where(['active' => 1])]

此外，您可以指定任意运算符如下

//SQL:`id >= 10`$cond = ['>=', 'id', 10] //SQL:`id != 10`$cond = ['!=', 'id', 10]

可进行精准搜索和模糊搜索
$prCon=[‘and’, ‘user_id = 0’, “salesman = $condition[sid]”];

if (isset($condition['mobile']) && $condition['mobile']) 
{array_push($prCon, ['like','mobile',$condition['mobile']]);
} 

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