|
| 1 | +docker启动:https://hub.docker.com/_/arangodb/ |
| 2 | +``` |
| 3 | +docker run -e ARANGO_RANDOM_ROOT_PASSWORD=1 -d arangodb |
| 4 | +//随机生成一个密码.默认用户名root,,docker logs 查看密码 |
| 5 | +``` |
| 6 | + |
| 7 | +SQL|AQL |
| 8 | +---|--- |
| 9 | +database | database |
| 10 | +table| collection |
| 11 | +row| document |
| 12 | +column| attribute |
| 13 | +table joins| collection joins |
| 14 | +primary key| _key |
| 15 | +index| index |
| 16 | + |
| 17 | +场景|SQL|AQL |
| 18 | +----|---|--- |
| 19 | +插入一条|INSERT INTO users (name, gender) VALUES ("John Doe", "m");|INSERT {name: "John Doe", gender: "m" } INTO users |
| 20 | +插入多条|INSERT INTO users (name, gender) VALUES ("John Doe", "m"),("Jane Smith", "f")|FOR user IN [{ name: "John Doe", gender: "m" }, { name: "Jane Smith", gender: "f" } ] INSERT user INTO users |
| 21 | +更新|UPDATE users SET name = "John Smith" WHERE id = 1;|UPDATE { _key:"1" } WITH { name: "John Smith" } IN users |
| 22 | +删除id|DELETE FROM users WHERE id = 1;|REMOVE { _key:"1" } IN users |
| 23 | +删除多个|DELETE FROM users WHERE active = 1|FOR user IN users FILTER user.active == 1 REMOVE user IN users |
| 24 | +查询|selct * from users | for u in users return u |
| 25 | +排序|SELECT * FROM users WHERE active = 1 ORDER BY name, gender| FOR user IN users FILTER user.active == 1 SORT user.name, user.gender RETURN user |
| 26 | +条数|SELECT gender, COUNT(*) AS number FROM users WHERE active = 1 GROUP BY gender|FOR user IN users FILTER user.active == 1 COLLECT gender = user.gender WITH COUNT INTO number RETURN { gender: gender, number: number } |
| 27 | +分组|SELECT YEAR(dateRegister) AS year, MONTH(dateRegister) AS month, COUNT(*) AS number FROM users WHERE active = 1 GROUP BY year, month HAVING number > 20;|FOR user IN users FILTER user.active == 1 COLLECT year = DATE_YEAR(user.dateRegistered), month = DATE_MONTH(user.dateRegistered) WITH COUNT INTO number FILTER number > 20 RETURN { year: year, month: month, number: number } |
| 28 | +最大值最小值|SELECT MIN(dateRegistered) AS minDate, MAX(dateRegistered) AS maxDate FROM users WHERE active = 1;|FOR user IN users FILTER user.active == 1 COLLECT AGGREGATE minDate = MIN(user.dateRegistered), maxDate = MAX(user.dateRegistered) RETURN { minDate, maxDate } |
| 29 | +join|SELECT * FROM users INNER JOIN friends ON (friends.user = users.id);|FOR user IN users FOR friend IN friends FILTER friend.user == user._key RETURN MERGE(user, friend)//合并 |
| 30 | +left join|SELECT * FROM users LEFT JOIN friends ON (friends.user = users.id); |FOR user IN users LET friends = ( FOR friend IN friends FILTER friend.user == user._key RETURN friend ) FOR friendToJoin IN ( LENGTH(friends) > 0 ? friends : [ { /* no match exists */ } ] ) RETURN { user: user, friend: friend } |
| 31 | + |
| 32 | +## graphs-->aql |
| 33 | +1.一种是找层级(几度好友) |
| 34 | +2.一种是找最近的路径 |
| 35 | +1.语法: |
| 36 | +FOR vertex[, edge[, path]] |
| 37 | + IN [min[..max]] |
| 38 | + OUTBOUND|INBOUND|ANY startVertex |
| 39 | + GRAPH graphName |
| 40 | + [OPTIONS options] |
| 41 | + |
| 42 | +vertex:点 |
| 43 | +edge:线 |
| 44 | +path:点和线组成(分:vertices和edges) |
| 45 | +min..max:从几度到第几度 |
| 46 | +OUTBOUND|INBOUND|ANY:从某个顶点传出.传出或双向 |
| 47 | +GRAPH graphName: graphs表名称 |
| 48 | + |
| 49 | +例如:查询某个用户1度好友关系 |
| 50 | +``` |
| 51 | + for v,e in 1 OUTBOUND @user_key GRAPH 'user_follow' |
| 52 | + filter e._to!=@user_key |
| 53 | + return v.user_id |
| 54 | +
|
| 55 | +``` |
| 56 | +@user_key等以@开头的为占位符,防止注入 |
| 57 | +``` |
| 58 | +语法:@分割 |
| 59 | +FOR u IN users |
| 60 | + FILTER u.id == @id && u.name == @name |
| 61 | + RETURN u |
| 62 | +api: |
| 63 | +{ |
| 64 | + "query": "FOR u IN users FILTER u.id == @id && u.name == @name RETURN u", |
| 65 | + "bindVars": { |
| 66 | + "id": 123, |
| 67 | + "name": "John Smith" |
| 68 | + } |
| 69 | +} |
| 70 | +``` |
| 71 | + |
| 72 | +2.语法: |
| 73 | +FOR vertex[, edge] |
| 74 | + IN OUTBOUND|INBOUND|ANY SHORTEST_PATH |
| 75 | + startVertex TO targetVertex |
| 76 | + GRAPH graphName |
| 77 | + [OPTIONS options] |
| 78 | +例如: |
| 79 | +``` |
| 80 | +FOR v, e IN OUTBOUND SHORTEST_PATH 'circles/A' |
| 81 | +TO 'circles/D' |
| 82 | +GRAPH 'traversalGraph' |
| 83 | +RETURN [v._key, e._key] |
| 84 | +
|
| 85 | +``` |
| 86 | + |
| 87 | +AQL:函数:https://docs.arangodb.com/3.2/AQL/Functions/ |
| 88 | +Aql操作:https://docs.arangodb.com/3.2/AQL/Operations/ |
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