[英]My SQL command isn't working
我有兩個表分別名為user和Submit。 我想自然地加入他們。 然后將它們按列分組。 然后選擇兩列。 給他們起別名。 然后按給定的別名對它們進行排序。
我的代碼已在下面給出。
select name, count(result) as name, tried from user
natural join submission group by name sort by tried;
但是,這不起作用。 我收到一個錯誤:
1064-您的SQL語法有誤; 檢查與您的MySQL服務器版本對應的手冊以獲取正確的語法,以在第2行的“按計數(結果)LIMIT 0、30”附近使用
您有兩個具有相同名稱的結果:
select name, <-- 1st "anme"
count(result) as name, <-- 2nd name
tried from user natural join submission group by name order by tried;
該修復很容易,因為您需要做的就是更改COUNT個結果的別名
select name,
count(result) as result_count,
tried from user natural join submission group by name order by tried;
select name,
count(result) as result_count,
tried from `user` natural join submission group by name ORDER by tried;
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