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我使用的是Mongo PHP擴展,我想在php中加入2個集合。我搜索了四周,但人們通常會說「你可以使用map-reduce」,但我不能在php中這樣做。如何在Php程序語言中使用Mongodb加入2個集合?
我的數據是這樣的:
users
{
"_id": "4ca30369fd0e910ecc000006",
"login": "user11",
"pass": "example_pass",
"date": "2010-09-29"
},
{
"_id": "4ca30373fd0e910ecc000007",
"login": "user22",
"pass": "example_pass",
"date": "2010-09-29"
}
news
{
"_id": "4ca305c2fd0e910ecc000003",
"name": "news 333",
"content": "news content 3333",
"user_id": "4ca30373fd0e910ecc000007",
"date": "2010-09-29"
},
{
"_id": "4ca305c2fd0e910ecc00000b",
"name": "news 222",
"content": "news content 2222",
"user_id": "4ca30373fd0e910ecc000007",
"date": "2010-09-29"
},
{
"_id": "4ca305b5fd0e910ecc00000a",
"name": "news 111",
"content": "news content",
"user_id": "4ca30369fd0e910ecc000006",
"date": "2010-09-29"
}
我如何用PHP編寫此SQL與MongoDB的?
SELECT n.*, u.*
FROM news AS n
INNER JOIN users AS u ON n.user_id = u.id
「我搜索。人們通常說」你可以使用map-reduce「。但我不能在PHP中」該聲明是不正確的, PHP驅動程序已完全支持地圖縮小,無論哪種方式,我不會使用地圖縮減爲此 – Sammaye