條件查詢

$customers = Customer::find()->where($cond)->all();

$cond就是我們所謂的條件，條件的寫法也根據查詢數據的不同存在差異，那麽如何用yii2的方式來寫查詢條件呢？

[[簡單條件]]

// 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]]:將不同的條件組合在一起，用法舉例：

//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)` //此寫法‘=‘可以換成其他操作符，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]]:

//SQL:`id IN (1, 2, 3)`
$cond = [‘in‘, ‘id‘, [1, 2, 3]] or $cond = [‘id‘=>[1, 2, 3]]

//IN條件也適用於多字段
$cond = [‘in‘, [‘id‘, ‘name‘], [[‘id‘ => 1, ‘name‘ => ‘foo‘], [‘id‘ => 2, ‘name‘ => ‘bar‘]]]

//也適用於內嵌sql語句
$cond = [‘in‘, ‘user_id‘, (new Query())->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用法類似

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

此外，您可以指定任意運算符如下

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

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

 可進行精準搜索和模糊搜索

$prCon=[‘and‘, ‘user_id = 0‘,  "salesman = $condition[sid]"];

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

yii2數據條件查詢-where專題