在 MySQL 中组合 3 列

Question

I want to combine 3 columns, for example:

id  c_id    choice_a    choice_b        choice_c

1   1    Agra College   RBS College     St Jhones
2   2    Agra College   RBS College     St Jhones
3   3    Agra College   St Jhones       RBS College
4   6    Dyalbagh       Agra College    mahrana college

How would I approach this problem?

Answer 1

select CONCAT_WS(' ',col1 , col2,col3) from table

In CONCAT_WS() first argument is separator by which u want to separate columns values