ʹע
1ڿʹãԽPDO滻ɿܵModel֧֣Ҳ޸init()ӿڣݿconfig
2˷ֲʽ޸self:$table_pathĴ洢λãָӦõķֲʽļͬĿ¼
3linuxΪself:$table_pathĴ洢λãΪɶдĿ¼
4updateУҪʹ{table}ؼִ

ʹụ̀
// ȡɷֱ
$obj = SubTable::init('order')->hash('123');
// ֶ
$obj = SubTable::init('order')->update('alter table {table} add transactor varchar(10) not Null;');
// 
$obj = SubTable::init('order')->update('alter table {table} add index index_name (shop_name);');

ѯ˵
򵥱ѯʹhash÷ֱƣȻϳɵSQLвѯɡ
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