ThinkPHP5 CURL operation method for database

Db::query();
Db::execute();
Db::table()->select();所有数据，二维数组，结果不存在时返回空数组
Db::table->find();一条数据，一维数组，结果不存在时返回NULL
Db::table->value();一条数据，结果不存在时返回空
Db::table->column();返回一个一维数组；如果有第二个参数，返回以第二个数作为标识的数组，结果不存在时，返回NULL
Db::table()->...表名加表前缀
Db::name()->..忽略表前缀

//Add data [Array]

Db::name()->insert();返回影响行数
Db::name()->insertGetId(); 获取最后的新增id
Db::name()->insertAll();插入全部数据

//Update database [Array]

Db::name()->where()->update(); 返回影响行数
Db::name()->where()->setField('name','小米');更新数据的某一个字段 返回影响行数
Db:name()->where->setInc('num'); num字段名每次自增1
Db:name()->where->setInc('num',5); num字段名每次自增5
Db::name()->where()->setDec('num'); num字段每次自减

Delete

Db::name()->where()->delete(); 返回影响行数
如果要删除的条件是主键，可以不写where
Db::name()->delete(1); 删除id=1的记录

Conditional constructor

Db::name()->where()->buildSql();返回sql语句
Db::name()->where("id=1")->buildSql();传递条件
Db::name()->where("id",1)->buildSql();传递字段名，和想使用的值
Db::name()->where("id","<>",1)->buildSql(); 字段名，表达式，想要判断的值
Db::name()->where(&#39;id&#39;,&#39;between&#39;,&#39;1,5&#39;)->buildSql(); id在1-5之间的，包括1和5
Db::name()->where([&#39;id&#39;=>1])->buildSql();
Db::name()->where([&#39;id&#39;=>[&#39;in&#39;,[1,2,3,4]]])->buildSql();

[The relationship between the two conditions is and]

Db::name()->where(
['id'=>1],
['name'=>'kaluo']
)->buildSql();
EXP 是条件表达式
Db::name()->where("id","EXP"," not in (1,2,3)")->buildSql();

[The relationship between the two conditions is OR]

Db::name()->where("id","in","1,2,3")->whereOr('name','buld')->buildSql();

where() contains arrays, strings, and parameters

# Remarks [letters will be compiled into the following symbols, etc.] [Conditions are not case-sensitive]

# EQ =
# NEQ <>
# LT <
# ELT <=
# GT >
# EGT >=
# BETWEEN BETWEEN * AND *
# NOTBETWEEN NOT BETWEEN * AND *
# IN IN(*,*)
# NOTIN NO TIN(*,*)

Expression::
between
in

Chain operation

Db::table()->where('id','>',10)->select();查询的表中的所有的字段
【field方法】Db::table()->where('id','>',10)->field("name,id")->select();查询表中的name,id字段
【order方法】Db::table()->where('id','>',10)->field("name,id")->order("id DESC")->limit(3,5)->select();查询表中的name,id字段,倒叙排序,从第三条开始取，取5条
【page方法】【page(2,5)从第二页开始，显示五条】Db::table()->where('id','>',10)->field("name,id")->order("id DESC")->page(3,5)->select();查询表中的name,id字段,倒叙排序,从第三页开始取，取5条
【group分组】Db::table()->where('id','>',10)->field("name,id")->group("`group`")->select();查询表中的name,id字段,以group分组

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