TP5 使用 union 后 order by 排序与 paginate分页

**TP5 使用 union 后 order by 排序与 paginate分页**

在项目开发过程中遇到需要使用 union() 方法的情况，出现了很多问题，于是记录一下。

在最开始时使用

[code]$listInfo = (new AdminFinancial())->alias('f')

->field('f.*,fa.adjustment_type as details_type,fa.currency_amount,fa.currency_code')

->join('admin_financial_adjustment fa ',"f.id = fa.financial_id" ,"left")

->where("fa.currency_amount != 0")

->union("SELECT f.*,fc.charge_type as details_type,fc.currency_amount,fc.currency_code FROM `admin_financial` `f` inner JOIN `admin_financial_charge` `fc` ON `f`.`id` = fc.financial_id WHERE f.auth_id = '$shop_id' AND f.poste_date BETWEEN '$start_date' AND '$end_date' and fc.currency_amount != 0")

->union("SELECT f.*,ff.fee_type as details_type,ff.currency_amount,ff.currency_code FROM `admin_financial` `f` inner JOIN `admin_financial_fee` `ff` ON `f`.`id` = ff.financial_id WHERE f.auth_id = '$shop_id' AND f.poste_date BETWEEN '$start_date' AND '$end_date' and ff.currency_amount != 0 ")

->select();

后，可以查出所需数据，但加入 order() 进行排序时，会出现 

 Incorrect usage of UNION and ORDER BY

这种错误，把order by 放入到 union 子句中也并没有什么效果，之后经过查找资料发现可以构建子查询进行解决

[code]$info1 = (new AdminFinancial())->alias('f')

->field('f.*,fa.adjustment_type as details_type,fa.currency_amount,fa.currency_code')

->join('admin_financial_adjustment fa ',"f.id = fa.financial_id" ,"left")

->where("fa.currency_amount != 0")

->buildSql();

$info2 = (new AdminFinancial())->alias('f')

->field('f.*,fc.charge_type as details_type,fc.currency_amount,fc.currency_code')

->join('admin_financial_charge fc ',"f.id = fc.financial_id" ,"left")

->where("fc.currency_amount != 0")

->buildSql();

$info3 = (new AdminFinancial())->alias('f')

->field('f.*,ff.fee_type as details_type,ff.currency_amount,ff.currency_code')

->join('admin_financial_fee ff ',"f.id = ff.financial_id" ,"left")

->where("ff.currency_amount != 0")

->union([$info1,$info2])

->buildSql();

$listInfo = db::table($info3.' as f')

->order("f.id asc")

->paginate('10', false, ['page' => '1'])

->toArray();

结果正确，分页也可以使用。 

注意：构建子查询是 查询字段需要保持一致

• 点赞
• 收藏
• 分享
• 文章举报