Summary of common operations of addition, deletion and modification of tb5 framework database Db

Add data insert

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$data = [
  'name_cn' => '张三',
  'name_en' => 'jack',
];
$res = Db::name('style')->insert($data);

adding data.

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INSERT INTO `tf_style` (`name_cn` , `name_en`) VALUES ('张三' , 'jack')

tp5 can also insertAllinsert multiple data.

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$data = [
  'name_cn' => '张三',
  'name_en' => 'jack',
];
$res = Db::name('style')->insertGetId($data);

Get the inserted id.

Modify data update

Update data, how to use update.

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$res = Db::name('style')->where('id',4)->update(['name_cn'=>'李四']);
UPDATE `tf_style` SET `name_cn` = '李四' WHERE `id` = 4；

The returned result is the number of affected rows.

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$where = new Where();
$where['id'] = ['>',2];
$res = Db::name('style')->where($where)->update(['name_cn'=>'李四']);

Conditional operations through $ where object.

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$where[] = ['id','>',2];
$res = Db::name('style')->where($where)->update(['name_cn'=>'王五']);

it is also fine.

The primary key can be directly written into the data data.

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$res = Db::name('style')->update(['name_cn'=>'王五','id'=>2]);

The results are as follows:

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UPDATE `tf_style` SET `name_cn` = '王五' WHERE `id` = 2;

Only one piece of data can be modified in this way.

Only modify one field, use setFieldmethod.

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$res = Db::name('style')->where('id',2)->setField(['name_cn'=>'刘备']);
$res = Db::name('style')->where('id',2)->setField(['name_cn'=>'刘备','name_en'=>'LiuBei']);
UPDATE `tf_style` SET `name_cn` = '刘备' , `name_en` = 'LiuBei' WHERE `id` = 2

The effect is updatealmost the same.

Delete data

Delete one.

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$res = Db::name('style')->where('id',2)->delete();
$res = Db::name('style')->delete('2');

Delete multiple entries.

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$res = Db::name('style')->delete('2,3');

id is written in the string.

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$res = Db::name('style')->delete([2,3,4]);

Or by id array.

Query dataselect

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$data = Db::query('select * from tf_action');
$data = Db::query('select * from tf_action where id > ? and id < ?',[1,10]);
$sql = Db::getLastSql();

Use query for query.

Delete, add, modify, use execute.

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$data = Db::table('tf_action')->select();

The full name of the table is used here.

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$data = Db::name('action')->select();

The name of the table with the prefix removed is used here.

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$data = db('action')->select();

Helper function, the effect is Db::namesimilar.

But they are not exactly the same.

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$data = db('action')->where('id','>',1)->where('id','<',9)->select();

Multi-condition query.

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$data = db('action')->where('id','>',20)->whereOr('id','<',9)->select();

Or query.

If the intermediate condition is empty, it means =.

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$where = new Where();
$where['name'] = ['like','%户%'];
$where['id'] = ['>',1];
$data = db('action')->where($where)->select();
$where[] = ['name','like','%户%'];
$where[] = ['id','>',1];
$data = db('action')->where($where)->select();

Combination query.

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$where = new Where();
$where['name'] = ['like','%户%'];
$where['id'] = ['>',1];
$data = db('action')->where($where)->limit(2,2)->order('id desc')->select();

Sort by pages.

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$where = new Where();
$where['name'] = ['like','%户%'];
$where['id'] = ['>',1];
$data = db('action')->where($where)->limit(2,2)->order('id desc')->field('id,name')->select();

Query the specified field.

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$where = new Where();
$where['name'] = ['like','%户%'];
$where['id'] = ['>',1];
$data = db('action')->where($where)->limit(2,2)->order('id desc')->field('id aid,name')->select();

Alias.

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$data = db('action')->where($where)->field('count(*) as count')->find();

Use system functions.

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$data = db('action')->where("name like '%户%' AND id > 1")->select();

It is OK to write a string directly.