我有以下查詢: SELECT
fruit.date,
fruit.name,
fruit.reason,
fruit.id,
fruit.notes,
food.name
FROM
fruit
LEFT JOIN
food_fruits AS ff ON fruit.fruit_id = ff.fruit_id A
子查詢1: SELECT * from big_table
where category = 'fruits' and name = 'apple'
order by yyyymmdd desc
解釋: table | key | extra
big_table | name_yyyymmdd | using where
看起來不錯! 子查詢2: SELECT * from b
我在我的數據庫中的以下兩個表: 表1:圖像 列:jeid [和其他人] 主鍵: jeid 行數:160萬 表2:media_names 列:jeid,介質類型,名字,姓氏 主鍵:jeid,MEDIA_TYPE 指數:名字,姓氏 行數:160萬 我運行下面的查詢: SELECT media.jeid FROM image AS media
LEFT JOIN file_girls_names AS
這個查詢(JOIN): SELECT DISTINCT Token
FROM ID
INNER JOIN Tokens ON ID.Token_ID = Tokens.Token_ID
WHERE ID.Type = 'org'
OR (
ID.Type = 'lemma'
AND Tokens.Value <3
)
ORDER BY ID.Token_ID
LIMIT 200