这里有点复杂的SQL问题。
我目前有一个与多个字段匹配的SELECT语句,就像这样。
SELECT field1, field2, field3, field4, field5 FROM table WHERE field1 = 'variable 1' AND field2 = 'variable 2' AND field3 = 'variable 3' AND field4 = 'variable 4' AND field5 = 'variable 5'
我想修改该语句,以使其使用OR而不是AND,从而选择与任何字段匹配的所有记录。
下一步是使用评分系统对结果进行排名。
If field 1 was matched then 1000 is added to the score If field 2 was matched then 800 is added to the score If field 3 was matched then 600 is added to the score If field 4 was matched then 10 is added to the score If field 5 was matched then 1 is added to the score
所以…
匹配1-如果field2和field 3匹配,则得分为1400
匹配2-如果field1和field 4匹配,则得分将为1010
比赛1将在结果顶部。
对于使用SQL实现此目标的任何帮助,我们将不胜感激。
尝试:
SELECT .... FROM .... ORDER BY (CASE WHEN field1 = 'variable 1' THEN 1000 ELSE 0 END +CASE WHEN field2 = 'variable 2' THEN 800 ELSE 0 END +CASE WHEN field3 = 'variable 3' THEN 600 ELSE 0 END +CASE WHEN field4 = 'variable 4' THEN 10 ELSE 0 END +CASE WHEN field5 = 'variable 5' THEN 1 ELSE 0 END ) DESC