What are the operating methods of Thinkphp5.0 on the database?

Basic usage

Query operation

Db::query('select * from think_user where id=?',[8]);

Write operation

Db::execute('insert into think_user (id, name) values (?, ?)',[8,'thinkphp']);

Query constructor

Query data

find returns a record, and the returned result is a one-dimensional array. If the result does not exist, NULL is returned

Db::table('think_user')->where('id',1)->find();

select returns all records. The returned result is a two-dimensional array. If the result does not exist, an empty array is returned.

Db::table('think_user')->where('status',1)->select();

Assistant function

The system provides A db assistant function can make query more convenient:

db('user')->where('id',1)->find();
db('user')->where('status',1)->select();

Note: Using the db assistant function will reconnect to the database every time by default, while using the Db::name or Db::table method will do the same. Singleton. If the db function needs to use the same link, you can pass in the third parameter, for example

db('user',[],false)->where('id',1)->find();
db('user',[],false)->where('status',1)->select();

Add data

Use the insert method of the Db class to add data to the database Submit data

$data = ['foo' => 'bar', 'bar' => 'foo'];
Db::table('think_user')->insert($data);

Add multiple pieces of data

To add multiple pieces of data, just pass the data to be added directly to the insertAll method of the Db class

$data = [    ['foo' => 'bar', 'bar' => 'foo'],
    ['foo' => 'bar1', 'bar' => 'foo1'],
    ['foo' => 'bar2', 'bar' => 'foo2']
];
Db::name('user')->insertAll($data);

insertAll method adds data successfully and returns the number of successfully added items

Assistant function

// 添加单条数据
db('user')->insert($data);

// 添加多条数据
db('user')->insertAll($list);

Update data

update method returns The number of affected data, if no data is modified, returns 0

Db::table('think_user')->where('id', 1)->update(['name' => 'thinkphp']);

Update the value of a field: The setField method returns the number of affected data, if no data field is modified, returns 0

Db::table('think_user')->where('id',1)->setField('name', 'thinkphp');

自增或自减一个字段的值
// score 字段加 1
Db::table('think_user')->where('id', 1)->setInc('score');
// score 字段加 5
Db::table('think_user')->where('id', 1)->setInc('score', 5);
// score 字段减 1
Db::table('think_user')->where('id', 1)->setDec('score');
// score 字段减 5
Db::table('think_user')->where('id', 1)->setDec('score', 5);

Delay Update

Db::table('think_user')->where('id', 1)->setInc('score', 1, 10);

Delete data

// 根据主键删除
Db::table('think_user')->delete(1);
Db::table('think_user')->delete([1,2,3]);

// 条件删除    
Db::table('think_user')->where('id',1)->delete();
Db::table(&#39;think_user&#39;)->where(&#39;id&#39;,&#39;<&#39;,10)->delete();

Conditional query method

where

You can use the where method for AND conditional query:

Db::table('think_user')
    ->where('name','like','%thinkphp')
    ->where('status',1)
    ->find();

whereOr method

Db::table('think_user')
    ->where('name','like','%thinkphp')
    ->whereOr('title','like','%thinkphp')
    ->find();

Mixed query

where method and whereOr Methods often need to be mixed together in complex query conditions. Here is an example:

$result = Db::table('think_user')->where(function ($query) {
    $query->where('id', 1)->whereor('id', 2);
})->whereOr(function ($query) {
    $query->where('name', 'like', 'think')->whereOr('name', 'like', 'thinkphp');
})->select();

Query expression

Query expression supports most SQL queries Syntax is also the essence of ThinkPHP query language. The format of query expressions is:

where('字段名','表达式','查询条件');
whereOr('字段名','表达式','查询条件');

表达式 含义
EQ、= 等于（=）
NEQ、<> 不等于（<>）
GT、> 大于（>）
EGT、>= 大于等于（>=）
LT、< 小于（<）
ELT、<= 小于等于（<=）
LIKE 模糊查询
[NOT] BETWEEN （不在）区间查询
[NOT] IN （不在）IN 查询
[NOT] NULL 查询字段是否（不）是NULL
[NOT] EXISTS EXISTS查询
EXP 表达式查询，支持SQL语法
> time 时间比较
< time 时间比较
between time 时间比较
notbetween time 时间比较

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