SQLdelete_hash
DELETE Hash
DELETE로 Hash 키를 삭제
DELETE로 Hash 키를 삭제합니다.
테스트 데이터 입력
Example
| 명령> | hset myname1 name kim age 25 birthday 1995-01-01 city Seoul |
| 결과> | 4 |
| 명령> | hset myname2 name kang age 30 birthday 1990-01-01 city Daejeon |
| 결과> | 4 |
| 명령> | hset myname3 name park age 20 birthday 2000-01-01 city Seoul hobby ski,bike |
| 결과> | 5 |
| 명령> | hset myname4 name choe age 30 birthday 1990-01-01 city Daejeon |
| 결과> | 4 |
| 명령> | hset myname5 name lee age 35 birthday 1985-01-01 city Busan |
| 결과> | 4 |
Key로 삭제
DELETE FROM HASH.MYNAME1
키 하나를 지정하거나 '*'를 사용해서 여러 개 키를 삭제할 수 있습니다.
Example
| 명령> | select * from hash.*; |
| 결과> |
0) key|name|age|birthday|city|hobby 1) myname1|kim|25|1995-01-01|Seoul| 2) myname2|kang|30|1990-01-01|Daejeon| 3) myname3|park|20|2000-01-01|Seoul|ski,bike 4) myname4|choe|30|1990-01-01|Daejeon| 5) myname5|lee|35|1985-01-01|Busan| |
| 명령> | delete from hash.myname1; opcode |
| 결과> | 1 keys deleted |
| 명령> | delete from hash.myname*; opcode |
| 결과> | 4 keys deleted |
WHERE 조건
비교: =, <, <=, >, >=, !=, <>
Where 조건으로 키를 삭제할 수 있습니다.
삭제 명령은 키가 지워지므로 필요한 키를 다시 넣고 시작하세요.
주의할 점은 where 조건에 field를 사용할 경우에도 키가 삭제됩니다.
field만 삭제할 경우 레디스 원래 명령을 사용하세요.
Example
BETWEEN, NOT BETWEEN
Example
| 명령> | delete from hash.* where key between 'myname1' and 'myname2'; opcode |
| 결과> | 2 keys deleted |
| 명령> | delete from hash.* where key not between 'myname1' and 'myname2'; opcode |
| 결과> | 3 keys deleted |
| 데이터 입력 | |
| 명령> | delete from hash.* where age between 25 and 30; opcode |
| 결과> | 3 keys deleted |
| 명령> | delete from hash.* where age not between 25 and 30; opcode |
| 결과> | 2 keys deleted |
IN, NOT IN
Example
| 명령> | delete from hash.* where key in ('myname1','myname2'); opcode |
| 결과> | 2 keys deleted |
| 명령> | delete from hash.* where key not in ('myname1','myname2'); opcode |
| 결과> | 3 keys deleted |
| 데이터 입력 | |
| 명령> | delete from hash.* where city in ('Seoul','Daejeon'); opcode |
| 결과> | 4 keys deleted |
| 명령> | delete from hash.* where city not in ('Seoul','Daejeon'); opcode |
| 결과> | 1 keys deleted |
GLOB, NOT GLOB
*(별표), ?(물음표)
대소문자를 구분한다.
Example
LIKE, NOT LIKE
%(퍼센트), _(밑줄)
대소문자를 구분하지 않는다.
Example
OPCODE
delete from hash.myname1;
delete from hash.myname*;
delete from hash.* where key > 'myname4';
delete from hash.* where name = 'kim';
delete from hash.* where age <= 30;
delete from hash.* where hobby is null;
delete from hash.* where key between 'myname1' and 'myname2';
delete from hash.* where key not between 'myname1' and 'myname2';
delete from hash.* where age between 25 and 30;
delete from hash.* where age not between 25 and 30;
delete from hash.* where key in ('myname1','myname2');
delete from hash.* where key not in ('myname1','myname2');
delete from hash.* where city in ('Seoul','Daejeon');
delete from hash.* where city not in ('Seoul','Daejeon');
delete from hash.* where city glob 'Seo*';
delete from hash.* where city glob 'A*';
delete from hash.* where city not glob 'A*';
delete from hash.* where birthday like '19%';
delete from hash.* where birthday like '19%';
delete from hash.* where birthday not like '19%';
| << Delete ZSet | Delete Hash | Delete Stream >> |
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)에서 레디스는 어떨까요?