MYSQL选择逗号后的值

Question

对于mysql来说很新，我有一个文本列。值有两种可能的输入方案：

TIME
hour, second

或

NAME
second

如何检查值是否具有第一种格式（小时和秒以逗号分隔），如果是，则仅选择“秒”？

Answer 1

//Assume that you have two formats only for your input like :

$input = '6, 30';

//or 

$input = '30';

//Maybe you can try to explode your input into array first with comma :

$input_array = explode(",",$input);

//Then you check whether there is second value in your array or not, if yes then take the second value, else take the first one:

$value = count($input_array) > 1 ? $input_array[1] : $input_array[0];

//Here you will always get the right value :

echo $value;

Answer 2

提示：

select if(locate(',', yourcolumn) > 0, right(yourcolumn, (length(yourcolumn) - locate(',', yourcolumn))), yourcolumn)