thinkphp3.2 where 条件查询

时间:2022-12-14 10:17:48

thinkphp3.2 where 条件查询

在连贯操作中条件where的操作有时候自己很晕,所以整理下,有助于使用

查询条件

支持的表达式查询,tp不区分大小写

含义 TP运算符 SQL运算符 例子 实际查询条件
等于 EQ = $where['id'] = 2
($where['id'] = array('EQ','1'))
id = 2
不等于 NEQ != $where['id'] = array('NEQ','1') id!=2
大于 GT > $where['id'] = array('GT','1') id >1
大于等于 EGT EGT $where['id'] = array('EGT','1') id>=1
小于 < < $where['id'] = array('lt',1) id < 1
小于等于 <= <= $where['id'] = array('elt',1) id<=1
匹配 like like $where['id'] = array('like','%begin')
$where['id'] = array('like','begin%')
$where['id'] = array('like','%begin%')
where id like '%begin'
where id like 'begin%'
where id like'%begin%'
在范围内包括俩端值 between 0<=id<=10 $where['id'] = array('between',array('0','10')) where id between 0 and 10
不在范围内 not between 0 >id and 1o < id $where['id'] = array('not between',array('0','10')) where id not between 0 and 10
在枚举的值中 in in $where['id'] = array('in',array('1','2','5')) where id in ('1','2','3')
不在枚举值中 not in not in $where['id'] = array('not in',array('1','2',5)) where id not in ('1','2','5')
exp 表达式查询,支持SQL语法

exp 是表达式的意思,如果你觉得对于一个值限制条件太多的话就可以用这个

$where['id'] = array('exp','in ( select id from id from tableb)');

复查的查询语句

有的时候,我们希望通过一次的查询就能解决问题,这个时候查询条件往往比较复杂,但是却比多次查询库来的高效。

实在是搞不定的话就直接用$where['_string'] = 'xxxx', 这个代表查询的时候拼接上 xxx 条件,一次性解决问题

$where['_string'] = 'left join A on A.id = b.id where a.id not in (select id from C)';

  1. 区间查询(一个值得多种情况)
默认是 and
$where['id'] =array(array('neq','8'),array('elt','200'),'and'); // 小于等于200 不等于 8 $where['id'] = array(array('neq','8'),'array('neq','10')','or'); // 不等于8或者不等于10
  1. 复合查询

    相当于封装了新的查询条件在里面
$where['a'] = 5;
$where['b'] = 6;
$where['_logic'] = 'or'; sql:where a = 5 or b = 6; $condition['c'] = '3';
$condition['d'] = '4'
$condition['_logic'] = 'or'
$where['a'] = 9;
$where['_complex'] = $condition; sql: where a=9 and (c = 3 or d = 4) 根据需求,灵活使用(无限套下去)

3.sql 查询

如果有设置了读写分离的话 query 是查询 execute是更新保存

M()->query('select * from a');

M()->execute('update a set counts = 3 where id = 1103')

4.获取要执行的sql 语句

有的时候条件太复杂,比如 id in(xxxxx),这个xxx就是通过一系列操作获得的结果,嫌麻烦的就直接 都扔进去,写sql 又长,就直接获取sql语句扔进去

1.fetchsql
2.buildsql
3.select(false) M('user')->fetchsql(true)->select();
M('user')->buildsql();
M('user')->select(false);