{"id":5296,"date":"2024-11-14T08:22:04","date_gmt":"2024-11-14T00:22:04","guid":{"rendered":"https:\/\/fwq.ai\/blog\/5296\/"},"modified":"2024-11-14T08:22:04","modified_gmt":"2024-11-14T00:22:04","slug":"oracle%e9%95%bf%e5%ba%a6%e4%b8%ba10%e6%80%8e%e4%b9%88%e9%99%90%e5%88%b6","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/5296\/","title":{"rendered":"oracle\u957f\u5ea6\u4e3a10\u600e\u4e48\u9650\u5236"},"content":{"rendered":"

\u9650\u5236 \u5b57\u7b26\u4e32\u957f\u5ea6\u4e3a 10<\/strong><\/p>\n

\u5728 Oracle \u6570\u636e\u5e93\u4e2d\uff0c\u9650\u5236\u5b57\u7b26\u4e32\u957f\u5ea6\u7684\u6700\u5e38\u7528\u65b9\u6cd5\u662f\u4f7f\u7528 VARCHAR \u6570\u636e\u7c7b\u578b\u3002VARCHAR \u662f\u53ef\u53d8\u957f\u5ea6\u5b57\u7b26\u4e32\uff0c\u6700\u591a\u53ef\u5b58\u50a8\u6307\u5b9a\u7684\u6700\u5927\u957f\u5ea6\u7684\u5b57\u7b26\u3002<\/p>\n

\u5982\u4f55\u9650\u5236 Oracle \u5b57\u7b26\u4e32\u957f\u5ea6\u4e3a 10\uff1f<\/strong><\/p>\n

\u8981\u9650\u5236 Oracle \u5b57\u7b26\u4e32\u957f\u5ea6\u4e3a 10\uff0c\u8bf7\u6309\u7167\u4ee5\u4e0b\u6b65\u9aa4\u64cd\u4f5c\uff1a<\/p>\n

    \n
  1. \u521b\u5efa\u4e00\u4e2a\u5e26\u6709 VARCHAR \u6570\u636e\u7c7b\u578b\u7684\u5217\uff1a<\/li>\n<\/ol>\n
    CREATE TABLE table_name (\n  column_name VARCHAR(10)\n);<\/pre>\n
     \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
      \n
    1. \u5728\u5b57\u6bb5\u5b9a\u4e49\u4e2d\u6307\u5b9a\u957f\u5ea6\uff1a<\/li>\n<\/ol>\n
      VARCHAR(10)<\/pre>\n
       \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
      \u8fd9\u5c06\u786e\u4fdd\u8be5\u5217\u53ea\u80fd\u5b58\u50a8\u6700\u591a 10 \u4e2a\u5b57\u7b26\u7684\u5b57\u7b26\u4e32\u3002\u5f53\u5c1d\u8bd5\u63d2\u5165\u8d85\u8fc7 10 \u4e2a\u5b57\u7b26\u7684\u5b57\u7b26\u4e32\u65f6\uff0cOracle \u5c06\u663e\u793a\u622a\u65ad\u9519\u8bef\u3002<\/p>\n
      \u6ce8\u610f\uff1a<\/strong><\/p>\n
        \n
      • VARCHAR \u6570\u636e\u7c7b\u578b\u5b58\u50a8\u5b57\u7b26\u6570\uff0c\u800c\u4e0d\u662f\u5b57\u8282\u6570\u3002\u56e0\u6b64\uff0c\u5982\u679c\u60a8\u8981\u5b58\u50a8 Unicode \u5b57\u7b26\uff0c\u5219\u6700\u5927\u957f\u5ea6\u5c06\u6839\u636e\u6240\u4f7f\u7528\u7684\u7f16\u7801\u800c\u6709\u6240\u4e0d\u540c\u3002<\/li>\n
      • \u5bf9\u4e8e\u56fa\u5b9a\u957f\u5ea6\u5b57\u7b26\u4e32\uff0c\u53ef\u4ee5\u4f7f\u7528 CHAR \u6570\u636e\u7c7b\u578b\uff0c\u5b83\u5f3a\u5236\u6267\u884c\u6307\u5b9a\u957f\u5ea6\uff0c\u800c\u4e0d\u7ba1\u5b57\u7b26\u5bbd\u5ea6\u5982\u4f55\u3002<\/li>\n
      • \u5982\u679c\u73b0\u6709\u8868\u4e2d\u5217\u7684\u957f\u5ea6\u4e0d\u6b63\u786e\uff0c\u53ef\u4ee5\u4f7f\u7528 ALTER TABLE \u8bed\u53e5\u6765\u4fee\u6539\u5b83\uff1a<\/li>\n<\/ul>\n
        ALTER TABLE table_name ALTER COLUMN column_name VARCHAR(10);<\/pre>\n
         \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
        \u4ee5\u4e0a\u5c31\u662f\u957f\u5ea6\u4e3a10\u600e\u4e48\u9650\u5236\u7684\u8be6\u7ec6\u5185\u5bb9\uff0c\u66f4\u591a\u8bf7\u5173\u6ce8\u7c73\u4e91\u7f51\u5176\u5b83\u76f8\u5173\u6587\u7ae0\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"
        \u9650\u5236 \u5b57\u7b26\u4e32\u957f\u5ea6\u4e3a 10 \u5728 Oracle \u6570\u636e\u5e93\u4e2d\uff0c\u9650\u5236\u5b57\u7b26\u4e32\u957f\u5ea6\u7684\u6700\u5e38\u7528\u65b9\u6cd5\u662f\u4f7f\u7528 VARCHAR \u6570\u636e\u7c7b\u578b\u3002VARCHAR \u662f\u53ef\u53d8\u957f\u5ea6\u5b57\u7b26\u4e32\uff0c\u6700\u591a\u53ef\u5b58\u50a8\u6307\u5b9a\u7684\u6700\u5927\u957f\u5ea6\u7684\u5b57\u7b26\u3002 \u5982\u4f55\u9650\u5236 Oracle \u5b57\u7b26\u4e32\u957f\u5ea6\u4e3a 10\uff1f \u8981\u9650\u5236 Oracle \u5b57\u7b26\u4e32\u957f\u5ea6\u4e3a 10\uff0c\u8bf7\u6309\u7167\u4ee5\u4e0b\u6b65\u9aa4\u64cd\u4f5c\uff1a \u521b\u5efa\u4e00\u4e2a\u5e26\u6709 VARCHAR \u6570\u636e\u7c7b\u578b\u7684\u5217\uff1a CREATE TABLE table_name ( column_name VARCHAR(10) ); \u767b\u5f55\u540e\u590d\u5236 \u5728\u5b57\u6bb5\u5b9a\u4e49\u4e2d\u6307\u5b9a\u957f\u5ea6\uff1a VARCHAR(10) \u767b\u5f55\u540e\u590d\u5236 \u8fd9\u5c06\u786e\u4fdd\u8be5\u5217\u53ea\u80fd\u5b58\u50a8\u6700\u591a 10 \u4e2a\u5b57\u7b26\u7684\u5b57\u7b26\u4e32\u3002\u5f53\u5c1d\u8bd5\u63d2\u5165\u8d85\u8fc7 10 \u4e2a\u5b57\u7b26\u7684\u5b57\u7b26\u4e32\u65f6\uff0cOracle \u5c06\u663e\u793a\u622a\u65ad\u9519\u8bef\u3002 \u6ce8\u610f\uff1a VARCHAR \u6570\u636e\u7c7b\u578b\u5b58\u50a8\u5b57\u7b26\u6570\uff0c\u800c\u4e0d\u662f\u5b57\u8282\u6570\u3002\u56e0\u6b64\uff0c\u5982\u679c\u60a8\u8981\u5b58\u50a8 Unicode \u5b57\u7b26\uff0c\u5219\u6700\u5927\u957f\u5ea6\u5c06\u6839\u636e\u6240\u4f7f\u7528\u7684\u7f16\u7801\u800c\u6709\u6240\u4e0d\u540c\u3002 \u5bf9\u4e8e\u56fa\u5b9a\u957f\u5ea6\u5b57\u7b26\u4e32\uff0c\u53ef\u4ee5\u4f7f\u7528 CHAR \u6570\u636e\u7c7b\u578b\uff0c\u5b83\u5f3a\u5236\u6267\u884c\u6307\u5b9a\u957f\u5ea6\uff0c\u800c\u4e0d\u7ba1\u5b57\u7b26\u5bbd\u5ea6\u5982\u4f55\u3002 \u5982\u679c\u73b0\u6709\u8868\u4e2d\u5217\u7684\u957f\u5ea6\u4e0d\u6b63\u786e\uff0c\u53ef\u4ee5\u4f7f\u7528 ALTER TABLE \u8bed\u53e5\u6765\u4fee\u6539\u5b83\uff1a ALTER TABLE table_name ALTER COLUMN column_name […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[16],"tags":[],"class_list":["post-5296","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/5296","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/comments?post=5296"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/5296\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=5296"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=5296"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=5296"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}