{"id":51528,"date":"2024-12-03T13:50:26","date_gmt":"2024-12-03T05:50:26","guid":{"rendered":"https:\/\/fwq.ai\/blog\/51528\/"},"modified":"2024-12-03T13:50:26","modified_gmt":"2024-12-03T05:50:26","slug":"%e6%b7%b1%e5%85%a5%e6%8e%a2%e8%ae%a8oracle%e6%97%b6%e9%97%b4%e6%a0%bc%e5%bc%8f%e4%bf%ae%e6%94%b9%e7%9a%84%e6%96%b9%e6%b3%95","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/51528\/","title":{"rendered":"\u6df1\u5165\u63a2\u8ba8Oracle\u65f6\u95f4\u683c\u5f0f\u4fee\u6539\u7684\u65b9\u6cd5"},"content":{"rendered":"

<\/b> <\/p>\n

\u6df1\u5165\u63a2\u8ba8Oracle\u65f6\u95f4\u683c\u5f0f\u4fee\u6539\u7684\u65b9\u6cd5<\/h1>\n

\u4eca\u65e5\u4e0d\u80af\u57cb\u5934\uff0c\u660e\u65e5\u4f55\u4ee5\u62ac\u5934\uff01\u6bcf\u65e5\u4e00\u53e5\u52aa\u529b\u81ea\u5df1\u7684\u8bdd\u54c8\u54c8~\u54c8\u55bd\uff0c\u4eca\u5929\u6211\u5c06\u7ed9\u5927\u5bb6\u5e26\u6765\u4e00\u7bc7\uff0c\u4e3b\u8981\u5185\u5bb9\u662f\u8bb2\u89e3<\/span>\u7b49\u7b49\uff0c\u611f\u5174\u8da3\u7684\u670b\u53cb\u53ef\u4ee5\u6536\u85cf\u6216\u8005\u6709\u66f4\u597d\u7684\u5efa\u8bae\u5728\u8bc4\u8bba\u63d0\u51fa\uff0c\u6211\u90fd\u4f1a\u8ba4\u771f\u770b\u7684\uff01\u5927\u5bb6\u4e00\u8d77\u8fdb\u6b65\uff0c\u4e00\u8d77\u5b66\u4e60\uff01<\/p>\n

Oracle\u65f6\u95f4\u683c\u5f0f\u4fee\u6539\u65b9\u6cd5\u8be6\u89e3<\/p>\n

\u5728Oracle\u6570\u636e\u5e93\u4e2d\uff0c\u65f6\u95f4\u683c\u5f0f\u5728\u6570\u636e\u67e5\u8be2\u3001\u6570\u636e\u63d2\u5165\u548c\u6570\u636e\u5c55\u793a\u4e2d\u8d77\u7740\u81f3\u5173\u91cd\u8981\u7684\u4f5c\u7528\u3002\u6b63\u786e\u7684\u65f6\u95f4\u683c\u5f0f\u53ef\u4ee5\u4f7f\u6570\u636e\u66f4\u52a0\u6e05\u6670\u3001\u6613\u8bfb\uff0c\u5e76\u4e14\u6709\u52a9\u4e8e\u6570\u636e\u5206\u6790\u3002\u672c\u6587\u5c06\u8be6\u7ec6\u4ecb\u7ecd\u5728Oracle\u6570\u636e\u5e93\u4e2d\u5982\u4f55\u4fee\u6539\u65f6\u95f4\u683c\u5f0f\u7684\u65b9\u6cd5\uff0c\u5e76\u63d0\u4f9b\u5177\u4f53\u7684\u4ee3\u7801\u793a\u4f8b\u3002<\/p>\n

\u4e00\u3001\u4fee\u6539\u6570\u636e\u8868\u4e2d\u65f6\u95f4\u5b57\u6bb5\u7684\u683c\u5f0f
\u5728Oracle\u6570\u636e\u5e93\u4e2d\uff0c\u53ef\u4ee5\u4f7f\u7528ALTER TABLE\u8bed\u53e5\u6765\u4fee\u6539\u6570\u636e\u8868\u4e2d\u65f6\u95f4\u5b57\u6bb5\u7684\u683c\u5f0f\u3002\u4e0b\u9762\u662f\u4e00\u4e2a\u793a\u4f8b\uff0c\u5047\u8bbe\u6709\u4e00\u4e2a\u540d\u4e3aEMPLOYEE\u7684\u6570\u636e\u8868\uff0c\u5176\u4e2d\u5305\u542b\u4e00\u4e2a\u65e5\u671f\u7c7b\u578b\u7684\u5b57\u6bb5HIRE_DATE\uff0c\u6211\u4eec\u5e0c\u671b\u5c06\u5176\u663e\u793a\u683c\u5f0f\u6539\u4e3aYYYY-MM-DD HH24:MI:SS\uff1a<\/p>\n

ALTER TABLE EMPLOYEE MODIFY HIRE_DATE DATE FORMAT 'YYYY-MM-DD HH24:MI:SS';<\/pre>\n
\u901a\u8fc7\u4ee5\u4e0a\u8bed\u53e5\uff0c\u6211\u4eec\u6210\u529f\u4fee\u6539\u4e86EMPLOYEE\u8868\u4e2dHIRE_DATE\u5b57\u6bb5\u7684\u65f6\u95f4\u683c\u5f0f\u3002<\/p>\n
\u4e8c\u3001\u67e5\u8be2\u6570\u636e\u65f6\u4fee\u6539\u65f6\u95f4\u683c\u5f0f
\u5728\u8fdb\u884c\u6570\u636e\u67e5\u8be2\u65f6\uff0c\u6709\u65f6\u5019\u9700\u8981\u6839\u636e\u5177\u4f53\u7684\u4e1a\u52a1\u9700\u6c42\u6765\u4fee\u6539\u65f6\u95f4\u5b57\u6bb5\u7684\u663e\u793a\u683c\u5f0f\u3002\u53ef\u4ee5\u901a\u8fc7\u4f7f\u7528TO_CHAR\u51fd\u6570\u6765\u5c06\u65e5\u671f\u7c7b\u578b\u8f6c\u6362\u4e3a\u6307\u5b9a\u683c\u5f0f\u7684\u5b57\u7b26\u4e32\u3002\u4ee5\u4e0b\u662f\u4e00\u4e2a\u793a\u4f8b\uff0c\u5047\u8bbe\u6211\u4eec\u9700\u8981\u67e5\u8be2EMPLOYEE\u8868\u4e2d\u7684\u5165\u804c\u65e5\u671f\uff0c\u5e76\u5c06\u5176\u663e\u793a\u683c\u5f0f\u6539\u4e3aYYYY\u5e74MM\u6708DD\u65e5\uff1a<\/p>\n
SELECT EMPLOYEE_ID, EMPLOYEE_NAME, TO_CHAR(HIRE_DATE, 'YYYY\u5e74MM\u6708DD\u65e5') AS HIRE_DATE_FORMAT\nFROM EMPLOYEE;<\/pre>\n
\u901a\u8fc7\u4e0a\u8ff0\u67e5\u8be2\u8bed\u53e5\uff0c\u6211\u4eec\u53ef\u4ee5\u5c06EMPLOYEE\u8868\u4e2d\u7684HIRE_DATE\u5b57\u6bb5\u663e\u793a\u4e3aYYYY\u5e74MM\u6708DD\u65e5\u7684\u683c\u5f0f\u3002<\/p>\n
\u4e09\u3001\u63d2\u5165\u6570\u636e\u65f6\u4fee\u6539\u65f6\u95f4\u683c\u5f0f
\u5f53\u9700\u8981\u5411\u6570\u636e\u8868\u4e2d\u63d2\u5165\u65f6\u95f4\u6570\u636e\u65f6\uff0c\u53ef\u4ee5\u4f7f\u7528TO_DATE\u51fd\u6570\u5c06\u5b57\u7b26\u4e32\u7c7b\u578b\u7684\u65f6\u95f4\u6570\u636e\u8f6c\u6362\u4e3a\u65e5\u671f\u7c7b\u578b\uff0c\u5e76\u4e14\u5728\u63d2\u5165\u65f6\u6307\u5b9a\u65f6\u95f4\u683c\u5f0f\u3002\u4ee5\u4e0b\u662f\u4e00\u4e2a\u793a\u4f8b\uff0c\u5047\u8bbe\u6211\u4eec\u8981\u5411EMPLOYEE\u8868\u4e2d\u63d2\u5165\u4e00\u6761\u65b0\u5458\u5de5\u7684\u4fe1\u606f\uff0c\u5305\u62ec\u5165\u804c\u65e5\u671f\uff1a<\/p>\n
INSERT INTO EMPLOYEE (EMPLOYEE_ID, EMPLOYEE_NAME, HIRE_DATE)\nVALUES (1, '\u5f20\u4e09', TO_DATE('2022-01-01 12:00:00', 'YYYY-MM-DD HH24:MI:SS'));<\/pre>\n
\u901a\u8fc7\u4ee5\u4e0a\u63d2\u5165\u8bed\u53e5\uff0c\u6211\u4eec\u6210\u529f\u5411EMPLOYEE\u8868\u4e2d\u63d2\u5165\u4e86\u4e00\u6761\u65b0\u5458\u5de5\u7684\u4fe1\u606f\uff0c\u5e76\u6307\u5b9a\u4e86\u5165\u804c\u65e5\u671f\u7684\u65f6\u95f4\u683c\u5f0f\u3002<\/p>\n
\u603b\u7ed3\uff1a
\u901a\u8fc7\u672c\u6587\u4ecb\u7ecd\uff0c\u6211\u4eec\u4e86\u89e3\u4e86\u5728Oracle\u6570\u636e\u5e93\u4e2d\u4fee\u6539\u65f6\u95f4\u683c\u5f0f\u7684\u65b9\u6cd5\uff0c\u5305\u62ec\u4fee\u6539\u6570\u636e\u8868\u4e2d\u65f6\u95f4\u5b57\u6bb5\u7684\u663e\u793a\u683c\u5f0f\u3001\u67e5\u8be2\u6570\u636e\u65f6\u4fee\u6539\u65f6\u95f4\u683c\u5f0f\u4ee5\u53ca\u63d2\u5165\u6570\u636e\u65f6\u4fee\u6539\u65f6\u95f4\u683c\u5f0f\u3002\u638c\u63e1\u8fd9\u4e9b\u65b9\u6cd5\u53ef\u4ee5\u4f7f\u6570\u636e\u5728\u6570\u636e\u5e93\u64cd\u4f5c\u548c\u5c55\u793a\u8fc7\u7a0b\u4e2d\u66f4\u52a0\u7075\u6d3b\u3001\u89c4\u8303\uff0c\u6709\u5229\u4e8e\u6570\u636e\u7684\u7ba1\u7406\u548c\u4f7f\u7528\u3002\u5e0c\u671b\u4ee5\u4e0a\u5185\u5bb9\u80fd\u591f\u5bf9\u8bfb\u8005\u5728\u5b9e\u9645\u7684\u6570\u636e\u5e93\u5e94\u7528\u5f00\u53d1\u4e2d\u6709\u6240\u5e2e\u52a9\u3002<\/p>\n
\u4eca\u5929\u5173\u4e8e\u300a\u6df1\u5165\u63a2\u8ba8Oracle\u65f6\u95f4\u683c\u5f0f\u4fee\u6539\u7684\u65b9\u6cd5\u300b\u7684\u5185\u5bb9\u5c31\u4ecb\u7ecd\u5230\u8fd9\u91cc\u4e86\uff0c\u662f\u4e0d\u662f\u5b66\u8d77\u6765\u4e00\u76ee\u4e86\u7136\uff01\u60f3\u8981\u4e86\u89e3\u66f4\u591a\u5173\u4e8e\u8be6\u89e3,\u4fee\u6539\u65b9\u6cd5\u7684\u5185\u5bb9\u8bf7\u5173\u6ce8\u7c73\u4e91\u516c\u4f17\u53f7\uff01<\/p>\n
\n
<\/dt>\n
\n   \u5982\u4f55\u68c0\u67e5Oracle\u8868\u662f\u5426\u88ab\u9501\u5b9a\uff1f\n <\/dd>\n<\/dl>\n","protected":false},"excerpt":{"rendered":"
\u6df1\u5165\u63a2\u8ba8Oracle\u65f6\u95f4\u683c\u5f0f\u4fee\u6539\u7684\u65b9\u6cd5 \u4eca\u65e5\u4e0d\u80af\u57cb\u5934\uff0c\u660e\u65e5\u4f55\u4ee5\u62ac\u5934\uff01\u6bcf\u65e5\u4e00\u53e5\u52aa\u529b\u81ea\u5df1\u7684\u8bdd\u54c8\u54c8~\u54c8\u55bd\uff0c\u4eca\u5929\u6211\u5c06\u7ed9\u5927\u5bb6\u5e26\u6765\u4e00\u7bc7\uff0c\u4e3b\u8981\u5185\u5bb9\u662f\u8bb2\u89e3\u7b49\u7b49\uff0c\u611f\u5174\u8da3\u7684\u670b\u53cb\u53ef\u4ee5\u6536\u85cf\u6216\u8005\u6709\u66f4\u597d\u7684\u5efa\u8bae\u5728\u8bc4\u8bba\u63d0\u51fa\uff0c\u6211\u90fd\u4f1a\u8ba4\u771f\u770b\u7684\uff01\u5927\u5bb6\u4e00\u8d77\u8fdb\u6b65\uff0c\u4e00\u8d77\u5b66\u4e60\uff01 Oracle\u65f6\u95f4\u683c\u5f0f\u4fee\u6539\u65b9\u6cd5\u8be6\u89e3 \u5728Oracle\u6570\u636e\u5e93\u4e2d\uff0c\u65f6\u95f4\u683c\u5f0f\u5728\u6570\u636e\u67e5\u8be2\u3001\u6570\u636e\u63d2\u5165\u548c\u6570\u636e\u5c55\u793a\u4e2d\u8d77\u7740\u81f3\u5173\u91cd\u8981\u7684\u4f5c\u7528\u3002\u6b63\u786e\u7684\u65f6\u95f4\u683c\u5f0f\u53ef\u4ee5\u4f7f\u6570\u636e\u66f4\u52a0\u6e05\u6670\u3001\u6613\u8bfb\uff0c\u5e76\u4e14\u6709\u52a9\u4e8e\u6570\u636e\u5206\u6790\u3002\u672c\u6587\u5c06\u8be6\u7ec6\u4ecb\u7ecd\u5728Oracle\u6570\u636e\u5e93\u4e2d\u5982\u4f55\u4fee\u6539\u65f6\u95f4\u683c\u5f0f\u7684\u65b9\u6cd5\uff0c\u5e76\u63d0\u4f9b\u5177\u4f53\u7684\u4ee3\u7801\u793a\u4f8b\u3002 \u4e00\u3001\u4fee\u6539\u6570\u636e\u8868\u4e2d\u65f6\u95f4\u5b57\u6bb5\u7684\u683c\u5f0f\u5728Oracle\u6570\u636e\u5e93\u4e2d\uff0c\u53ef\u4ee5\u4f7f\u7528ALTER TABLE\u8bed\u53e5\u6765\u4fee\u6539\u6570\u636e\u8868\u4e2d\u65f6\u95f4\u5b57\u6bb5\u7684\u683c\u5f0f\u3002\u4e0b\u9762\u662f\u4e00\u4e2a\u793a\u4f8b\uff0c\u5047\u8bbe\u6709\u4e00\u4e2a\u540d\u4e3aEMPLOYEE\u7684\u6570\u636e\u8868\uff0c\u5176\u4e2d\u5305\u542b\u4e00\u4e2a\u65e5\u671f\u7c7b\u578b\u7684\u5b57\u6bb5HIRE_DATE\uff0c\u6211\u4eec\u5e0c\u671b\u5c06\u5176\u663e\u793a\u683c\u5f0f\u6539\u4e3aYYYY-MM-DD HH24:MI:SS\uff1a ALTER TABLE EMPLOYEE MODIFY HIRE_DATE DATE FORMAT ‘YYYY-MM-DD HH24:MI:SS’; \u901a\u8fc7\u4ee5\u4e0a\u8bed\u53e5\uff0c\u6211\u4eec\u6210\u529f\u4fee\u6539\u4e86EMPLOYEE\u8868\u4e2dHIRE_DATE\u5b57\u6bb5\u7684\u65f6\u95f4\u683c\u5f0f\u3002 \u4e8c\u3001\u67e5\u8be2\u6570\u636e\u65f6\u4fee\u6539\u65f6\u95f4\u683c\u5f0f\u5728\u8fdb\u884c\u6570\u636e\u67e5\u8be2\u65f6\uff0c\u6709\u65f6\u5019\u9700\u8981\u6839\u636e\u5177\u4f53\u7684\u4e1a\u52a1\u9700\u6c42\u6765\u4fee\u6539\u65f6\u95f4\u5b57\u6bb5\u7684\u663e\u793a\u683c\u5f0f\u3002\u53ef\u4ee5\u901a\u8fc7\u4f7f\u7528TO_CHAR\u51fd\u6570\u6765\u5c06\u65e5\u671f\u7c7b\u578b\u8f6c\u6362\u4e3a\u6307\u5b9a\u683c\u5f0f\u7684\u5b57\u7b26\u4e32\u3002\u4ee5\u4e0b\u662f\u4e00\u4e2a\u793a\u4f8b\uff0c\u5047\u8bbe\u6211\u4eec\u9700\u8981\u67e5\u8be2EMPLOYEE\u8868\u4e2d\u7684\u5165\u804c\u65e5\u671f\uff0c\u5e76\u5c06\u5176\u663e\u793a\u683c\u5f0f\u6539\u4e3aYYYY\u5e74MM\u6708DD\u65e5\uff1a SELECT EMPLOYEE_ID, EMPLOYEE_NAME, TO_CHAR(HIRE_DATE, ‘YYYY\u5e74MM\u6708DD\u65e5’) AS HIRE_DATE_FORMAT FROM EMPLOYEE; \u901a\u8fc7\u4e0a\u8ff0\u67e5\u8be2\u8bed\u53e5\uff0c\u6211\u4eec\u53ef\u4ee5\u5c06EMPLOYEE\u8868\u4e2d\u7684HIRE_DATE\u5b57\u6bb5\u663e\u793a\u4e3aYYYY\u5e74MM\u6708DD\u65e5\u7684\u683c\u5f0f\u3002 \u4e09\u3001\u63d2\u5165\u6570\u636e\u65f6\u4fee\u6539\u65f6\u95f4\u683c\u5f0f\u5f53\u9700\u8981\u5411\u6570\u636e\u8868\u4e2d\u63d2\u5165\u65f6\u95f4\u6570\u636e\u65f6\uff0c\u53ef\u4ee5\u4f7f\u7528TO_DATE\u51fd\u6570\u5c06\u5b57\u7b26\u4e32\u7c7b\u578b\u7684\u65f6\u95f4\u6570\u636e\u8f6c\u6362\u4e3a\u65e5\u671f\u7c7b\u578b\uff0c\u5e76\u4e14\u5728\u63d2\u5165\u65f6\u6307\u5b9a\u65f6\u95f4\u683c\u5f0f\u3002\u4ee5\u4e0b\u662f\u4e00\u4e2a\u793a\u4f8b\uff0c\u5047\u8bbe\u6211\u4eec\u8981\u5411EMPLOYEE\u8868\u4e2d\u63d2\u5165\u4e00\u6761\u65b0\u5458\u5de5\u7684\u4fe1\u606f\uff0c\u5305\u62ec\u5165\u804c\u65e5\u671f\uff1a INSERT INTO EMPLOYEE (EMPLOYEE_ID, EMPLOYEE_NAME, HIRE_DATE) VALUES (1, ‘\u5f20\u4e09’, TO_DATE(‘2022-01-01 12:00:00’, ‘YYYY-MM-DD HH24:MI:SS’)); 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