About database operations of thinkphp5

1. Database configuration

##2.

query executeOriginal ecologysqlStatement addition, deletion, modification and query

$result = Db::execute('insert into log(user_id, ip) values(1, 11231)');
dump($result);
$result = Db::query('select * from log');
echo &#39;<pre class="brush:php;toolbar:false">&#39;;
var_dump($result);

3.

Parameter binding Named placeholder binding

$str = 'insert into log(user_id, ip) values(?, ?)';
$result = Db::execute($str, [1, '12312']);

$result = Db::query('select * from log where id = ?', [4]);

//占位符
Db::execute('insert into log(user_id, ip) values(:user_id, :ip)', ['user_id'=>12, 'ip'=>'5555']);

4.

Query Constructor

//添加：
Db::table('log')->insert(['user_id'=>1, 'ip'=>'654321']);

//更新
Db::table('log')
    ->where('id', 12)
    ->update(['user_id'=>123]);

//查询数据
$list = Db::table('log')
    ->where('id', 12)
    ->select();

//删除数据
Db::table('log')
    ->where('id', 10)
    ->delete();

How to query the table without adding a prefix:

Db::name('log')->insert(['user_id'=>44, 'ip'=>5555]);

##5.

DB

Chain operation

Methods to support chain query:

Method nameDescription##selectfindinsertupdatedaleteAggregation queryThings Support

Query Database
Query a single record
Insert record
##Update Record
Delete record	##value
Query value	column
Query column	chunk
Chunk query	##count
	##6.

//自动控制事物
Db::transaction(function (){
    Db::table('log')->delete(2);
    Db::table('log')->insert(['user_id'=>123]);
});

//手动控制事物的提交
//启动事物
Db::startTrans();
try {
    Db::table('log')
        ->where(2);
    Db::table('log')
        ->insert(['user_id' => 213]);
    Db::commit();
} catch (Exception $e){
    Db::rollback();
}

This article explains the database operations of thinkphp5. For more related content, please pay attention to the php Chinese website. Related recommendations:
thinkphp Detailed explanation of distributed database

##How to link the database through ThinkPHP

How to connect multiple databases through thinkphp

The above is the detailed content of About database operations of thinkphp5. For more information, please follow other related articles on the PHP Chinese website!