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Update 6.set.md #1114

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Oct 29, 2021
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Update 6.set.md #1114

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19 changes: 14 additions & 5 deletions docs-2.0/3.ngql-guide/5.operators/6.set.md
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Original file line number Diff line number Diff line change
Expand Up @@ -30,8 +30,9 @@ nebula> GO FROM "player102" OVER follow \
+-------------+
| follow._dst |
+-------------+
| "player100" |
| "player101" |
| "player102" |
| "player125" |
+-------------+

# 返回两个查询结果的并集，包含重复的元素。
Expand All @@ -41,9 +42,10 @@ nebula> GO FROM "player102" OVER follow \
+-------------+
| follow._dst |
+-------------+
| "player100" |
| "player101" |
| "player101" |
| "player102" |
| "player125" |
+-------------+

# UNION也可以和YIELD语句一起使用，去重时会检查每一行的所有列，每列都相同时才会去重。
Expand Down Expand Up @@ -80,7 +82,10 @@ nebula> GO FROM "player102" OVER follow \
INTERSECT \
GO FROM "player100" OVER follow \
YIELD dst(edge) AS id, properties(edge).degree AS Degree, properties($$).age AS Age;
Empty set (time spent 2990/3511 us)
+----+--------+-----+
| id | Degree | Age |
+----+--------+-----+
+----+--------+-----+
```

## MINUS
Expand All @@ -100,13 +105,17 @@ nebula> GO FROM "player100" OVER follow \
+-------------+
| follow._dst |
+-------------+
| "player102" |
| "player125" |
+-------------+

nebula> GO FROM "player102" OVER follow \
MINUS \
GO FROM "player100" OVER follow;
Empty set (time spent 2243/3259 us)
+-------------+
| follow._dst |
+-------------+
| "player100" |
+-------------+
```

## 集合运算符和管道符的优先级
Expand Down