#### update(array $data, $buildSql = false) 单条更新，返回影响的条数
```
$mysql->table('table')->where('id', 5)->update([
'uid' => 123,
'type' => 2,
'currency' => ['currency', '+', 1]
]);
```
#### updateAll(array $data, $buildSql = false) 批量更新，返回影响的条数
```
$data = [
['uid' => 123, 'type' => 1, 'currency' => ['currency', '+', 1]],
['uid' => 222, 'type' => 2, 'currency' => ['currency', '+', -2]]
];
$mysql->table('table')->where('id', 5)->updateAll($data);
```
#### setInc($field, $incr = 1, $buildSql = false) 自增，返回影响的条数
```
$mysql->table('table')->where('id', 5)->setInc('currency', 5);
```
#### setDec($field, $decr= 1, $buildSql = false) 自减，返回影响的条数
```
$mysql->table('table')->where('id', 5)->setDec('currency', 5);
```
