如何在 laravel 中使用 FIND_IN_SET 获取最后更新的记录？

Question

我在查询中使用 find_in_set 从逗号分隔的字段中获取数据。但它告诉我错误。

$results = DB::select("SELECT basic.updated_at,basic.updated_by,,ccbi.team_group_id,basic.id
FROM basic_info as  basic 
INNER JOIN emp_info  as  emp_details 
ON basic.emp_master_id =  emp_details.emp_id
WHERE basic.id IN (SELECT basic.id FROM basic_info as basic WHERE basic.updated_at = (SELECT MAX(basic.updated_at) FROM basic_info as basic)) AND basic.team_id =  '1' AND ('FIND_IN_SET(?,emp_details.emp_grp)' , '18')   ORDER BY basic.id DESC LIMIT 1");

以上查询显示错误：

Cardinality violation: 1241 Operand should contain 1 column(s)

如果我删除 AND ('FIND_IN_SET(?,emp_details.emp_grp)' , '18') 这部分，它将 return 正确结果。

Answer 1

您的查询中有几个拼写错误。我没有将所有内容都添加到 DB::select() 中，而是稍微清理了您的查询：

return DB::table('basic_info')
    ->select('basic_info.updated_at', 'basic_info.updated_by', 'basic_info.id')
    ->join('emp_info', 'basic.emp_master_id', 'emp_info.emp_id')
    ->whereRaw("basic_info.id IN (SELECT basic_info.id FROM basic_info WHERE basic_info.updated_at = (SELECT MAX(basic_info.updated_at) FROM basic_info) AND basic_info.team_id =  '1' AND FIND_IN_SET('18',emp_details.emp_grp) ORDER BY basic_info.id DESC LIMIT 1)")
    ->get();

以下内容对您有用吗？

如何在 laravel 中使用 FIND_IN_SET 获取最后更新的记录？

How to get last updated record with FIND_IN_SET in laravel?

mysql

laravel

find-in-set