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SQL

Select New
- Introduction
- STRING
- LIST
- SET
- ZSET
- HASH
- STREAM
- SUBQUERY
- UNION
- REDIS Functions
- DATE Functions
- INFO Query

SELECT UNION

UNION, INERSECT, EXCEPT를 활용한 복합 쿼리

합집합: UNION, UNION ALL
교집합: INTERSECT
차집합: EXCEPT

테스트 테이터 입력

Example

명령>	mset myval10 value10 myval30 value30 myval50 value50 myval70 value70
결과>	OK

UNION ALL

Example

명령>	select value from string.mystr* union all select value from string.myval*;
결과>	0) value 1) value10 2) value30 3) value50 4) value20 5) value40 6) value10 7) value30 8) value50 9) value70

UNION

Example

명령>	select value from string.mystr* union select value from string.myval*;
결과>	0) value 1) value10 2) value20 3) value30 4) value40 5) value50 6) value70

다른 데이터타입 간 UNION

Example

명령>	select value from string.mystr* union all select value from list.mylist3;
결과>	0) value 1) value10 2) value30 3) value50 4) value20 5) value40 6) AAA 7) BBB 8) CCC 9) DDD 10) EEE

숫자와 문자열 간 UNION

Example

명령>	select value from set.myset2 union select value from zset.myzset1;
결과>	0) value 1) 10 2) 20 3) 30 4) 40 5) 50 6) value10 7) value20 8) value30 9) value40 10) value50

INTERSECT

Example

명령>	select value from string.mystr* intersect select value from string.myval*;
결과>	0) value 1) value10 2) value30 3) value50
명령>	select value from zset.myzset2 intersect select value from set.myset1;
결과>	0) value 1) mem10 2) mem20 3) mem30 4) mem40 5) mem50

EXCEPT

Example

명령>	select value from string.mystr* except select value from string.myval*;
결과>	0) value 1) value20 2) value40
명령>	select value from zset.myzset2 except select value from set.myset1;
결과>	0) value 1) mem100 2) mem60 3) mem70 4) mem80 5) mem90

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