如何消除SQL中的重复计算？

Question

我有一个可以简化为的SQL:

SELECT * 
  FROM table 
 WHERE LOCATE( column, :keyword ) > 0 
ORDER BY LOCATE( column, :keyword )

您可以看到"LOCATE(column,:keyword)"的副本.有没有办法只计算一次？

Answer 1

SELECT *, LOCATE( column, :keyword ) AS somelabel 
FROM table 
WHERE somelabel > 0 
ORDER BY somelabel