ThinkPHP database operation aggregation query, time query, advanced query

The following tutorial column will introduce you to the aggregation query, time query, and advanced query of ThinkPHP database operations. I hope it will be helpful to friends in need! Aggregation query

In applications, we often use some statistical data, such as all current users (or those who meet certain conditions) number, the maximum points of all users, the average score of users, etc. ThinkPHP provides a series of built-in methods for these statistical operations, including:

Usage example:

Get the number of users:

Db::table('think_user')->count();
// 助手函数
db('user')->count();

Or according to field statistics:

Db::table('think_user')->count('id');
// 助手函数
db('user')->count('id');

Get the maximum points of users:

Db::table('think_user')->max('score');
// 助手函数
db('user')->max('score');

Get the minimum points of users whose points are greater than 0:

Db::table('think_user')->where('score>0')->min('score');
// 助手函数
db('user')->where('score>0')->min('score');

Get the user’s average points:

Db::table('think_user')->avg('score');
// 助手函数
db('user')->avg('score');

Statistics on the user’s total score:

Db::table('think_user')->sum('score');
// 助手函数
db('user')->sum('score');

Time query

Time comparison

##Use where method where

The method supports time comparison, for example:

// 大于某个时间
where('create_time','> time','2016-1-1');
// 小于某个时间
where('create_time','

The third parameter can be passed in any valid time expression, and your time field type will be automatically recognized. Supported time types include timestamps, datetime, date and int.

Use the whereTime method

The whereTime method provides quick query for date and time fields, the example is as follows:

// 大于某个时间
db('user')    ->whereTime('birthday', '>=', '1970-10-1')    ->select();
// 小于某个时间
db('user')    ->whereTime('birthday', 'select();
// 时间区间查询
db('user')    ->whereTime('birthday', 'between', ['1970-10-1', '2000-10-1'])    ->select();
// 不在某个时间区间
db('user')    ->whereTime('birthday', 'not between', ['1970-10-1', '2000-10-1'])    ->select();

Time expression

also provides more convenient time expression query, for example:

// 获取今天的博客
db('blog')    ->whereTime('create_time', 'today')    ->select();
// 获取昨天的博客
db('blog')    ->whereTime('create_time', 'yesterday')    ->select();
// 获取本周的博客
db('blog')    ->whereTime('create_time', 'week')    ->select();
// 获取上周的博客
db('blog')    ->whereTime('create_time', 'last week')    ->select();
// 获取本月的博客
db('blog')    ->whereTime('create_time', 'month')    ->select();
// 获取上月的博客
db('blog')    ->whereTime('create_time', 'last month')    ->select();
// 获取今年的博客
db('blog')    ->whereTime('create_time', 'year')    ->select();
// 获取去年的博客
db('blog')    ->whereTime('create_time', 'last year')    ->select();

If you query the time of the day, this week, this month and this year, it can also be simplified to:

// 获取今天的博客
db('blog')    ->whereTime('create_time', 'd')    ->select();
// 获取本周的博客
db('blog')    ->whereTime('create_time', 'w')    ->select();
// 获取本月的博客
db('blog')    ->whereTime('create_time', 'm')    ->select();
// 获取今年的博客
db('blog')    ->whereTime('create_time', 'y')    ->select();

Starting from version V5.0.5, you can also use the following method to query the time

// 查询两个小时内的博客
db('blog')    ->whereTime('create_time','2 hours')    ->select();

Advanced query

Quick query

Quick query method isA simplified way of writing the same query conditions in multiple fields

, which can further simplify the writing of query conditions. Use | to separate multiple fields to represent OR queries. Use & to separate AND query, you can implement the following query, for example:

Db::table('think_user')    ->where('name|title','like','thinkphp%')    ->where('create_time&update_time','>',0)    ->find();

The generated query SQL is:

SELECT * FROM `think_user` WHERE ( `name` LIKE 'thinkphp%' OR `title` LIKE 'thinkphp%') AND ( `create_time` > 0 AND `update_time` > 0 ) LIMIT 1

　Quick query supports all query expressions.

Interval query

Interval query isA kind of multiple queries for the same field Simplified way of writing the query condition

, for example:

Db::table('think_user')    ->where('name',['like','thinkphp%'],['like','%thinkphp'])    ->where('id',['>',0],['',10],'or')    ->find();

The generated SQL statement is:

SELECT * FROM `think_user` WHERE ( `name` LIKE 'thinkphp%' AND `name` LIKE '%thinkphp') AND ( `id` > 0 OR `id`  10 ) LIMIT 1

　The query condition of the interval query must be defined in an array, and all query expression.

The following query method is wrong:

Db::table('think_user')    ->where('name',['like','thinkphp%'],['like','%thinkphp'])    ->where('id',5,['',10],'or')    ->find();

Batch query

You can define batch conditional queries with multiple conditions, for example:

Db::table('think_user'->'name' => ['like','thinkphp%'],
        'title' => ['like','%thinkphp'],
        'id' => ['>',0],
        'status'=> 1->

The generated SQL statement is:

SELECT * FROM `think_user` WHERE `name` LIKE 'thinkphp%' AND `title` LIKE '%thinkphp' AND `id` > 0 AND `status` = '1'

Closure Query

Db::table('think_user')->select(function($query){    $query->where('name','thinkphp')            ->whereOr('id','>',10);
});

The generated SQL statement is:

SELECT * FROM `think_user` WHERE `name` = 'thinkphp' OR `id` > 10

Use Query object to query

You can also encapsulate the Query object in advance and pass it in select method, for example:

$query = new \think\db\Query;$query->name('user')    ->where('name','like','%think%')    ->where('id','>',10)    ->limit(10);
Db::select($query);

　

If a Query object is used, any chain operations called before the select method will be invalid.

Mixed query

You can combine all the methods mentioned above to perform mixed query, for example:

Db::table('think_user')    ->where('name',['like','thinkphp%'],['like','%thinkphp'])    ->where(function($query){        $query->where('id',['',100],'or');
    })    ->select();

The generated SQL statement is:

SELECT * FROM `think_user` WHERE ( `name` LIKE 'thinkphp%' AND `name` LIKE '%thinkphp') AND ( `id`  100 )

String condition query

For some practical Complex queries can also be queried directly using native SQL statements, for example:

Db::table('think_user')    ->where('id > 0 AND name LIKE "thinkphp%"')    ->select();

For safety reasons, we can use parameter binding for string query conditions, for example:

Db::table('think_user')    ->where('id > :id AND name LIKE :name ',['id'=>0, 'name'=>'thinkphp%'])    ->select();

V5. Starting from 0.4, ThinkPHP supports calling query conditions multiple times on the same field, for example:

Db::table('think_user')    ->where('name','like','%think%')    ->where('name','like','%php%')    ->where('id','in',[1,5,80,50])    ->where('id','>',10)    ->find();

Shortcut method (V5.0.5)

V5.0.5 version has added a series of shortcut methods to simplify queries, including:

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