{"id":257,"date":"2023-02-24T06:13:59","date_gmt":"2023-02-23T22:13:59","guid":{"rendered":"https:\/\/www.appblog.cn\/?p=257"},"modified":"2023-04-30T15:18:10","modified_gmt":"2023-04-30T07:18:10","slug":"redis-hash","status":"publish","type":"post","link":"https:\/\/www.appblog.cn\/index.php\/2023\/02\/24\/redis-hash\/","title":{"rendered":"Redis \u54c8\u5e0c(Hash)"},"content":{"rendered":"

Redis \u54c8\u5e0c(Hash)<\/h2>\n

Redis hash \u662f\u4e00\u4e2a string \u7c7b\u578b\u7684 field\uff08\u5b57\u6bb5\uff09\u548c value\uff08\u503c\uff09\u7684\u6620\u5c04\u8868\uff0chash \u7279\u522b\u9002\u5408\u7528\u4e8e\u5b58\u50a8\u5bf9\u8c61<\/p>\n

Redis \u4e2d\u6bcf\u4e2a hash \u53ef\u4ee5\u5b58\u50a8 2^32 – 1 \u952e\u503c\u5bf9\uff0840\u591a\u4ebf\uff09<\/p>\n

<\/p>\n

\u5b9e\u4f8b<\/strong><\/p>\n

127.0.0.1:6379> HMSET appblog name "redis tutorial" description "redis basic commands for caching" likes 20 visitors 23000\nOK\n127.0.0.1:6379> HGETALL appblog\n1) "name"\n2) "redis tutorial"\n3) "description"\n4) "redis basic commands for caching"\n5) "likes"\n6) "20"\n7) "visitors"\n8) "23000"<\/code><\/pre>\n
\u5728\u4ee5\u4e0a\u5b9e\u4f8b\u4e2d\uff0c\u6211\u4eec\u8bbe\u7f6e\u4e86 redis \u7684\u4e00\u4e9b\u63cf\u8ff0\u4fe1\u606f(name, description, likes, visitors) \u5230\u54c8\u5e0c\u8868\u7684 appblog \u4e2d<\/p>\n
Redis hash \u547d\u4ee4<\/h2>\n
hdel key field1 [field2]<\/h3>\n
\u5220\u9664\u4e00\u4e2a\u6216\u591a\u4e2a\u54c8\u5e0c\u8868\u5b57\u6bb5\uff0c\u4e0d\u5b58\u5728\u7684\u5b57\u6bb5\u5c06\u88ab\u5ffd\u7565<\/p>\n
redis 127.0.0.1:6379> HSET myhash field1 "foo"\n(integer) 1\nredis 127.0.0.1:6379> HDEL myhash field1\n(integer) 1\nredis 127.0.0.1:6379> HDEL myhash field2\n(integer) 0<\/code><\/pre>\n
hexists key field<\/h3>\n
\u67e5\u770b\u54c8\u5e0c\u8868 key \u4e2d\uff0c\u6307\u5b9a\u7684\u5b57\u6bb5\u662f\u5426\u5b58\u5728<\/p>\n
redis 127.0.0.1:6379> HSET myhash field1 "foo"\n(integer) 1\nredis 127.0.0.1:6379> HEXISTS myhash field1\n(integer) 1\nredis 127.0.0.1:6379> HEXISTS myhash field2\n(integer) 0<\/code><\/pre>\n
hget key field<\/h3>\n
\u83b7\u53d6\u5b58\u50a8\u5728\u54c8\u5e0c\u8868\u4e2d\u6307\u5b9a\u5b57\u6bb5\u7684\u503c\uff0c\u4e0d\u5b58\u5728\u65f6\u8fd4\u56de nil<\/p>\n
# \u5b57\u6bb5\u5b58\u5728\n\nredis> HSET site redis redis.com\n(integer) 1\n\nredis> HGET site redis\n"redis.com"\n\n# \u5b57\u6bb5\u4e0d\u5b58\u5728\n\nredis> HGET site mysql\n(nil)<\/code><\/pre>\n
hgetall key<\/h3>\n
\u83b7\u53d6\u5728\u54c8\u5e0c\u8868\u4e2d\u6307\u5b9a key \u7684\u6240\u6709\u5b57\u6bb5\u548c\u503c<\/p>\n
redis> HSET myhash field1 "Hello"\n(integer) 1\nredis> HSET myhash field2 "World"\n(integer) 1\nredis> HGETALL myhash\n1) "field1"\n2) "Hello"\n3) "field2"\n4) "World"\nredis> <\/code><\/pre>\n
hincrby key field increment<\/h3>\n
\u4e3a\u54c8\u5e0c\u8868 key \u4e2d\u7684\u6307\u5b9a\u5b57\u6bb5\u7684\u6574\u6570\u503c\u52a0\u4e0a\u589e\u91cf increment<\/p>\n
    \n
  • \u589e\u91cf\u4e5f\u53ef\u4ee5\u4e3a\u8d1f\u6570\uff0c\u76f8\u5f53\u4e8e\u5bf9\u6307\u5b9a\u5b57\u6bb5\u8fdb\u884c\u51cf\u6cd5\u64cd\u4f5c<\/li>\n
  • \u5982\u679c\u54c8\u5e0c\u8868\u7684 key \u4e0d\u5b58\u5728\uff0c\u4e00\u4e2a\u65b0\u7684\u54c8\u5e0c\u8868\u88ab\u521b\u5efa\u5e76\u6267\u884c HINCRBY \u547d\u4ee4<\/li>\n
  • \u5982\u679c\u6307\u5b9a\u7684\u5b57\u6bb5\u4e0d\u5b58\u5728\uff0c\u90a3\u4e48\u5728\u6267\u884c\u547d\u4ee4\u524d\uff0c\u5b57\u6bb5\u7684\u503c\u88ab\u521d\u59cb\u5316\u4e3a 0<\/li>\n
  • \u5bf9\u4e00\u4e2a\u50a8\u5b58\u5b57\u7b26\u4e32\u503c\u7684\u5b57\u6bb5\u6267\u884c HINCRBY \u547d\u4ee4\u5c06\u9020\u6210\u4e00\u4e2a\u9519\u8bef<\/li>\n
  • \u672c\u64cd\u4f5c\u7684\u503c\u88ab\u9650\u5236\u5728 64 \u4f4d(bit)\u6709\u7b26\u53f7\u6570\u5b57\u8868\u793a\u4e4b\u5185<\/li>\n<\/ul>\n
    redis> HSET myhash field 5\n(integer) 1\nredis> HINCRBY myhash field 1\n(integer) 6\nredis> HINCRBY myhash field -1\n(integer) 5\nredis> HINCRBY myhash field -10\n(integer) -5\nredis> <\/code><\/pre>\n
    hincrbyfloat key field increment<\/h3>\n
    \u4e3a\u54c8\u5e0c\u8868 key \u4e2d\u7684\u6307\u5b9a\u5b57\u6bb5\u7684\u6d6e\u70b9\u6570\u503c\u52a0\u4e0a\u589e\u91cf increment<\/p>\n
    \u5982\u679c\u6307\u5b9a\u7684\u5b57\u6bb5\u4e0d\u5b58\u5728\uff0c\u90a3\u4e48\u5728\u6267\u884c\u547d\u4ee4\u524d\uff0c\u5b57\u6bb5\u7684\u503c\u88ab\u521d\u59cb\u5316\u4e3a 0<\/p>\n
    redis> HSET mykey field 10.50\n(integer) 1\nredis> HINCRBYFLOAT mykey field 0.1\n"10.6"\nredis> HINCRBYFLOAT mykey field -5\n"5.6"\nredis> HSET mykey field 5.0e3\n(integer) 0\nredis> HINCRBYFLOAT mykey field 2.0e2\n"5200"\nredis> <\/code><\/pre>\n
    hkeys key<\/h3>\n
    \u83b7\u53d6\u6240\u6709\u54c8\u5e0c\u8868\u4e2d\u7684\u5b57\u6bb5<\/p>\n
    redis 127.0.0.1:6379> HSET myhash field1 "foo"\n(integer) 1\nredis 127.0.0.1:6379> HSET myhash field2 "bar"\n(integer) 1\nredis 127.0.0.1:6379> HKEYS myhash\n1) "field1"\n2) "field2"<\/code><\/pre>\n
    hlen key<\/h3>\n
    \u83b7\u53d6\u54c8\u5e0c\u8868\u4e2d\u5b57\u6bb5\u7684\u6570\u91cf<\/p>\n
    \u5f53 key \u4e0d\u5b58\u5728\u65f6\uff0c\u8fd4\u56de 0<\/p>\n
    redis 127.0.0.1:6379> HSET myhash field1 "foo"\n(integer) 1\nredis 127.0.0.1:6379> HSET myhash field2 "bar"\n(integer) 1\nredis 127.0.0.1:6379> HLEN myhash\n(integer) 2<\/code><\/pre>\n
    hmget key field1 [field2]<\/h3>\n
    \u83b7\u53d6\u6240\u6709\u7ed9\u5b9a\u5b57\u6bb5\u7684\u503c<\/p>\n
    \u5982\u679c\u6307\u5b9a\u7684\u5b57\u6bb5\u4e0d\u5b58\u5728\u4e8e\u54c8\u5e0c\u8868\uff0c\u90a3\u4e48\u8fd4\u56de\u4e00\u4e2a nil \u503c<\/p>\n
    redis 127.0.0.1:6379> HSET myhash field1 "foo"\n(integer) 1\nredis 127.0.0.1:6379> HSET myhash field2 "bar"\n(integer) 1\nredis 127.0.0.1:6379> HMGET myhash field1 field2 nofield\n1) "foo"\n2) "bar"\n3) (nil)<\/code><\/pre>\n
    hmset key field1 value1 [field2 value2 ]<\/h3>\n
    \u540c\u65f6\u5c06\u591a\u4e2a field-value (\u57df-\u503c)\u5bf9\u8bbe\u7f6e\u5230\u54c8\u5e0c\u8868 key \u4e2d<\/p>\n
      \n
    • \u6b64\u547d\u4ee4\u4f1a\u8986\u76d6\u54c8\u5e0c\u8868\u4e2d\u5df2\u5b58\u5728\u7684\u5b57\u6bb5<\/li>\n
    • \u5982\u679c\u54c8\u5e0c\u8868\u4e0d\u5b58\u5728\uff0c\u4f1a\u521b\u5efa\u4e00\u4e2a\u7a7a\u54c8\u5e0c\u8868\uff0c\u5e76\u6267\u884c HMSET \u64cd\u4f5c<\/li>\n<\/ul>\n
      redis 127.0.0.1:6379> HMSET myhash field1 "Hello" field2 "World"\nOK\nredis 127.0.0.1:6379> HGET myhash field1\n"Hello"\nredis 127.0.0.1:6379> HGET myhash field2\n"World"<\/code><\/pre>\n
      hset key field value<\/h3>\n
      \u5c06\u54c8\u5e0c\u8868 key \u4e2d\u7684\u5b57\u6bb5 field \u7684\u503c\u8bbe\u4e3a value<\/p>\n
        \n
      • \u5982\u679c\u54c8\u5e0c\u8868\u4e0d\u5b58\u5728\uff0c\u4e00\u4e2a\u65b0\u7684\u54c8\u5e0c\u8868\u88ab\u521b\u5efa\u5e76\u8fdb\u884c HSET \u64cd\u4f5c<\/li>\n
      • \u5982\u679c\u5b57\u6bb5\u5df2\u7ecf\u5b58\u5728\u4e8e\u54c8\u5e0c\u8868\u4e2d\uff0c\u65e7\u503c\u5c06\u88ab\u8986\u76d6<\/li>\n<\/ul>\n
        redis 127.0.0.1:6379> HSET myhash field1 "foo"\nOK\nredis 127.0.0.1:6379> HGET myhash field1\n"foo"\n\nredis 127.0.0.1:6379> HSET website google "www.g.cn"       # \u8bbe\u7f6e\u4e00\u4e2a\u65b0\u57df\n(integer) 1\n\nredis 127.0.0.1:6379> HSET website google "www.google.com" # \u8986\u76d6\u4e00\u4e2a\u65e7\u57df\n(integer) 0<\/code><\/pre>\n
        bashnx key field value<\/h3>\n
        \u53ea\u6709\u5728\u5b57\u6bb5 field \u4e0d\u5b58\u5728\u65f6\uff0c\u8bbe\u7f6e\u54c8\u5e0c\u8868\u5b57\u6bb5\u7684\u503c<\/p>\n
          \n
        • \u5982\u679c\u54c8\u5e0c\u8868\u4e0d\u5b58\u5728\uff0c\u4e00\u4e2a\u65b0\u7684\u54c8\u5e0c\u8868\u88ab\u521b\u5efa\u5e76\u8fdb\u884c HSET \u64cd\u4f5c<\/li>\n
        • \u5982\u679c\u5b57\u6bb5\u5df2\u7ecf\u5b58\u5728\u4e8e\u54c8\u5e0c\u8868\u4e2d\uff0c\u64cd\u4f5c\u65e0\u6548<\/li>\n
        • \u5982\u679c key \u4e0d\u5b58\u5728\uff0c\u4e00\u4e2a\u65b0\u54c8\u5e0c\u8868\u88ab\u521b\u5efa\u5e76\u6267\u884c HSETNX \u547d\u4ee4<\/li>\n<\/ul>\n
          redis 127.0.0.1:6379> HSETNX myhash field1 "foo"\n(integer) 1\nredis 127.0.0.1:6379> HSETNX myhash field1 "bar"\n(integer) 0\nredis 127.0.0.1:6379> HGET myhash field1\n"foo"<\/code><\/pre>\n
          hvals key<\/h3>\n
          \u83b7\u53d6\u54c8\u5e0c\u8868\u4e2d\u6240\u6709\u503c\uff0c\u5f53 key \u4e0d\u5b58\u5728\u65f6\uff0c\u8fd4\u56de\u4e00\u4e2a\u7a7a\u8868<\/p>\n
          redis 127.0.0.1:6379> HSET myhash field1 "foo"\n(integer) 1\nredis 127.0.0.1:6379> HSET myhash field2 "bar"\n(integer) 1\nredis 127.0.0.1:6379> HVALS myhash\n1) "foo"\n2) "bar"\n\n# \u7a7a\u54c8\u5e0c\u8868\/\u4e0d\u5b58\u5728\u7684key\n\nredis 127.0.0.1:6379> EXISTS not_exists\n(integer) 0\n\nredis 127.0.0.1:6379> HVALS not_exists\n(empty list or set)<\/code><\/pre>\n
          hscan key cursor [MATCH pattern] [COUNT count]<\/h3>\n
          \u8fed\u4ee3\u54c8\u5e0c\u8868\u4e2d\u7684\u952e\u503c\u5bf9<\/p>\n
          Redis HSCAN \u547d\u4ee4\u57fa\u672c\u8bed\u6cd5\u5982\u4e0b\uff1a<\/p>\n
          HSCAN key cursor [MATCH pattern] [COUNT count]\n``\n\n- cursor - \u6e38\u6807\n- pattern - \u5339\u914d\u7684\u6a21\u5f0f\n- count - \u6307\u5b9a\u4ece\u6570\u636e\u96c6\u91cc\u8fd4\u56de\u591a\u5c11\u5143\u7d20\uff0c\u9ed8\u8ba4\u503c\u4e3a 10\n\n```bash\n> HMSET sites google \"google.com\" appblog \"appblog.cn\" weibo \"weibo.com\" taobao \"taobao.com\"\nOK\n> HSCAN sites 0 match \"run*\"\n1) \"0\"\n2) 1) \"appblog\"\n2) \"appblog.cn\"<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"
          Redis \u54c8\u5e0c(Hash) Redis hash \u662f\u4e00\u4e2a string \u7c7b\u578b\u7684 field\uff08\u5b57\u6bb5\uff09\u548c val […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[14],"tags":[],"class_list":["post-257","post","type-post","status-publish","format-standard","hentry","category-redis"],"_links":{"self":[{"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/posts\/257","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/comments?post=257"}],"version-history":[{"count":0,"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/posts\/257\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/media?parent=257"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/categories?post=257"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/tags?post=257"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}