{"id":96298,"date":"2024-10-20T08:15:17","date_gmt":"2024-10-20T00:15:17","guid":{"rendered":"https:\/\/server.hk\/cnblog\/96298\/"},"modified":"2024-10-20T08:15:17","modified_gmt":"2024-10-20T00:15:17","slug":"oracle%e5%ad%97%e7%ac%a6%e7%9a%845%e7%a8%ae%e9%a1%9e%e5%9e%8b%e7%9a%84%e4%bb%8b%e7%b4%b9","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/96298\/","title":{"rendered":"Oracle\u5b57\u7b26\u76845\u7a2e\u985e\u578b\u7684\u4ecb\u7d39"},"content":{"rendered":"

Oracle\u5b57\u7b26\u76845\u7a2e\u985e\u578b\u7684\u4ecb\u7d39<\/h1>\n

\u5728\u6578\u64da\u5eab\u7ba1\u7406\u7cfb\u7d71\u4e2d\uff0c\u5b57\u7b26\u6578\u64da\u985e\u578b\u662f\u975e\u5e38\u91cd\u8981\u7684\u4e00\u90e8\u5206\uff0c\u5c24\u5176\u662f\u5728Oracle\u6578\u64da\u5eab\u4e2d\u3002Oracle\u63d0\u4f9b\u4e86\u591a\u7a2e\u5b57\u7b26\u6578\u64da\u985e\u578b\uff0c\u4ee5\u6eff\u8db3\u4e0d\u540c\u7684\u9700\u6c42\u3002\u672c\u6587\u5c07\u4ecb\u7d39Oracle\u5b57\u7b26\u7684\u4e94\u7a2e\u985e\u578b\uff0c\u5e6b\u52a9\u8b80\u8005\u66f4\u597d\u5730\u7406\u89e3\u9019\u4e9b\u6578\u64da\u985e\u578b\u7684\u7279\u6027\u53ca\u5176\u4f7f\u7528\u5834\u666f\u3002<\/p>\n

1. CHAR<\/h2>\n

CHAR\u6578\u64da\u985e\u578b\u7528\u65bc\u5b58\u5132\u56fa\u5b9a\u9577\u5ea6\u7684\u5b57\u7b26\u6578\u64da\u3002\u7576\u5b9a\u7fa9CHAR\u985e\u578b\u6642\uff0c\u5fc5\u9808\u6307\u5b9a\u5176\u9577\u5ea6\uff0c\u7bc4\u570d\u5f9e1\u52302000\u500b\u5b57\u7b26\u3002\u7121\u8ad6\u5be6\u969b\u5b58\u5132\u7684\u5b57\u7b26\u6578\u91cf\u5982\u4f55\uff0cOracle\u90fd\u6703\u586b\u5145\u7a7a\u683c\u4ee5\u9054\u5230\u6307\u5b9a\u7684\u9577\u5ea6\u3002<\/p>\n

CREATE TABLE example_char (\n    id NUMBER,\n    name CHAR(10)\n);\n<\/code><\/pre>\n
\u5728\u9019\u500b\u4f8b\u5b50\u4e2d\uff0c\u7121\u8ad6\u5be6\u969b\u8f38\u5165\u7684\u540d\u5b57\u9577\u5ea6\u5982\u4f55\uff0cOracle\u90fd\u6703\u81ea\u52d5\u586b\u5145\u7a7a\u683c\uff0c\u76f4\u5230\u9054\u523010\u500b\u5b57\u7b26\u7684\u9577\u5ea6\u3002<\/p>\n
2. VARCHAR2<\/h2>\n
VARCHAR2\u662fOracle\u4e2d\u6700\u5e38\u7528\u7684\u5b57\u7b26\u6578\u64da\u985e\u578b\u4e4b\u4e00\uff0c\u7528\u65bc\u5b58\u5132\u53ef\u8b8a\u9577\u5ea6\u7684\u5b57\u7b26\u6578\u64da\u3002\u8207CHAR\u4e0d\u540c\uff0cVARCHAR2\u53ea\u6703\u6839\u64da\u5be6\u969b\u5b58\u5132\u7684\u5b57\u7b26\u6578\u91cf\u4f54\u7528\u7a7a\u9593\uff0c\u6700\u5927\u9577\u5ea6\u53ef\u4ee5\u9054\u52304000\u500b\u5b57\u7b26\u3002<\/p>\n
CREATE TABLE example_varchar2 (\n    id NUMBER,\n    name VARCHAR2(50)\n);\n<\/code><\/pre>\n
\u5728\u9019\u500b\u4f8b\u5b50\u4e2d\uff0cname\u5b57\u6bb5\u53ef\u4ee5\u5b58\u5132\u6700\u591a50\u500b\u5b57\u7b26\uff0c\u4f46\u5982\u679c\u5be6\u969b\u8f38\u5165\u7684\u5b57\u7b26\u5c11\u65bc50\u500b\uff0c\u5247\u53ea\u4f54\u7528\u76f8\u61c9\u7684\u7a7a\u9593\u3002<\/p>\n
3. NCHAR<\/h2>\n
NCHAR\u6578\u64da\u985e\u578b\u7528\u65bc\u5b58\u5132\u56fa\u5b9a\u9577\u5ea6\u7684Unicode\u5b57\u7b26\u6578\u64da\u3002\u9019\u5c0d\u65bc\u9700\u8981\u652f\u6301\u591a\u7a2e\u8a9e\u8a00\u7684\u61c9\u7528\u7a0b\u5e8f\u975e\u5e38\u91cd\u8981\u3002NCHAR\u7684\u9577\u5ea6\u7bc4\u570d\u8207CHAR\u76f8\u540c\uff0c\u5f9e1\u52302000\u500b\u5b57\u7b26\u3002<\/p>\n
CREATE TABLE example_nchar (\n    id NUMBER,\n    name NCHAR(10)\n);\n<\/code><\/pre>\n
\u9019\u88e1\u7684name\u5b57\u6bb5\u5c07\u5b58\u5132\u56fa\u5b9a\u9577\u5ea6\u7684Unicode\u5b57\u7b26\uff0c\u4e26\u4e14\u540c\u6a23\u6703\u586b\u5145\u7a7a\u683c\u4ee5\u9054\u5230\u6307\u5b9a\u7684\u9577\u5ea6\u3002<\/p>\n
4. NVARCHAR2<\/h2>\n
NVARCHAR2\u662f\u7528\u65bc\u5b58\u5132\u53ef\u8b8a\u9577\u5ea6\u7684Unicode\u5b57\u7b26\u6578\u64da\u3002\u5b83\u7684\u6700\u5927\u9577\u5ea6\u4e5f\u53ef\u4ee5\u9054\u52304000\u500b\u5b57\u7b26\uff0c\u4e26\u4e14\u53ea\u6703\u6839\u64da\u5be6\u969b\u5b58\u5132\u7684\u5b57\u7b26\u6578\u91cf\u4f54\u7528\u7a7a\u9593\u3002\u9019\u4f7f\u5f97NVARCHAR2\u975e\u5e38\u9069\u5408\u9700\u8981\u591a\u8a9e\u8a00\u652f\u6301\u7684\u61c9\u7528\u3002<\/p>\n
CREATE TABLE example_nvarchar2 (\n    id NUMBER,\n    name NVARCHAR2(50)\n);\n<\/code><\/pre>\n
\u5728\u9019\u500b\u4f8b\u5b50\u4e2d\uff0cname\u5b57\u6bb5\u53ef\u4ee5\u5b58\u5132\u6700\u591a50\u500bUnicode\u5b57\u7b26\uff0c\u4e26\u4e14\u53ea\u4f54\u7528\u5be6\u969b\u4f7f\u7528\u7684\u7a7a\u9593\u3002<\/p>\n
5. CLOB<\/h2>\n
CLOB\uff08Character Large Object\uff09\u7528\u65bc\u5b58\u5132\u5927\u91cf\u7684\u5b57\u7b26\u6578\u64da\uff0c\u6700\u5927\u53ef\u4ee5\u9054\u52304GB\u3002\u9019\u7a2e\u6578\u64da\u985e\u578b\u9069\u5408\u5b58\u5132\u9577\u6587\u672c\uff0c\u5982\u6587\u7ae0\u3001\u5831\u544a\u6216\u5176\u4ed6\u5927\u6bb5\u6587\u5b57\u3002<\/p>\n
CREATE TABLE example_clob (\n    id NUMBER,\n    description CLOB\n);\n<\/code><\/pre>\n
\u5728\u9019\u500b\u4f8b\u5b50\u4e2d\uff0cdescription\u5b57\u6bb5\u53ef\u4ee5\u5b58\u5132\u5927\u91cf\u7684\u6587\u672c\u6578\u64da\uff0c\u9069\u5408\u9700\u8981\u8655\u7406\u5927\u6587\u672c\u7684\u61c9\u7528\u3002<\/p>\n
\u7e3d\u7d50<\/h2>\n
Oracle\u63d0\u4f9b\u4e86\u591a\u7a2e\u5b57\u7b26\u6578\u64da\u985e\u578b\uff0c\u5305\u62ecCHAR\u3001VARCHAR2\u3001NCHAR\u3001NVARCHAR2\u548cCLOB\uff0c\u6bcf\u7a2e\u6578\u64da\u985e\u578b\u90fd\u6709\u5176\u7279\u5b9a\u7684\u7528\u9014\u548c\u512a\u52e2\u3002\u9078\u64c7\u5408\u9069\u7684\u5b57\u7b26\u6578\u64da\u985e\u578b\u5c0d\u65bc\u6578\u64da\u5eab\u7684\u6027\u80fd\u548c\u5b58\u5132\u6548\u7387\u81f3\u95dc\u91cd\u8981\u3002\u4e86\u89e3\u9019\u4e9b\u6578\u64da\u985e\u578b\u7684\u7279\u6027\uff0c\u53ef\u4ee5\u5e6b\u52a9\u958b\u767c\u8005\u5728\u8a2d\u8a08\u6578\u64da\u5eab\u6642\u505a\u51fa\u66f4\u660e\u667a\u7684\u6c7a\u7b56\u3002<\/p>\n
\u5982\u679c\u60a8\u5c0d\u65bc\u5982\u4f55\u5728\u60a8\u7684\u9805\u76ee\u4e2d\u4f7f\u7528\u9019\u4e9b\u6578\u64da\u985e\u578b\u6709\u9032\u4e00\u6b65\u7684\u7591\u554f\uff0c\u6216\u8005\u9700\u8981\u5c0b\u627e\u5408\u9069\u7684 \u9999\u6e2fVPS<\/a> \u89e3\u6c7a\u65b9\u6848\uff0c\u8acb\u96a8\u6642\u8a2a\u554f\u6211\u5011\u7684\u7db2\u7ad9\u4ee5\u7372\u53d6\u66f4\u591a\u4fe1\u606f\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
\u4e86\u89e3Oracle\u4e2d\u4e94\u79cd\u5b57\u7b26\u7c7b\u578b\u7684\u8be6\u7ec6\u4ecb\u7ecd\uff0c\u5305\u62ecCHAR\u3001VARCHAR2\u3001NCHAR\u3001NVARCHAR2\u548cCLOB\uff0c\u52a9\u60a8\u4f18\u5316\u6570\u636e\u5e93\u8bbe\u8ba1\u3002<\/p>\n","protected":false},"author":0,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[101],"tags":[],"class_list":["post-96298","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/96298","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/types\/post"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=96298"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/96298\/revisions"}],"predecessor-version":[{"id":96299,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/96298\/revisions\/96299"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=96298"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=96298"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=96298"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}