{"id":60691,"date":"2024-10-13T05:00:16","date_gmt":"2024-10-12T21:00:16","guid":{"rendered":"https:\/\/server.hk\/cnblog\/60691\/"},"modified":"2024-10-13T05:00:16","modified_gmt":"2024-10-12T21:00:16","slug":"db2%e6%95%b8%e6%93%9a%e5%ba%ab%e4%b8%a6%e7%bd%ae%e7%99%bc%e7%94%9f%e6%99%82%ef%bc%8c%e8%a1%a8%e8%a6%81%e5%a6%82%e4%bd%95%e6%94%b9%e8%ae%8a%e6%9b%b4%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/60691\/","title":{"rendered":"DB2\u6578\u64da\u5eab\u4e26\u7f6e\u767c\u751f\u6642\uff0c\u8868\u8981\u5982\u4f55\u6539\u8b8a\u66f4\uff1f"},"content":{"rendered":"<h1 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id=\"%e5%a6%82%e4%bd%95%e9%80%b2%e8%a1%8c%e8%a1%a8%e7%9a%84%e6%94%b9%e8%ae%8a-qfFteVONbv\">\u5982\u4f55\u9032\u884c\u8868\u7684\u6539\u8b8a<\/h2>\n<p>\u5728DB2\u4e2d\uff0c\u5c0d\u8868\u9032\u884c\u6539\u8b8a\u7684\u4e3b\u8981\u65b9\u6cd5\u662f\u4f7f\u7528SQL\u8a9e\u53e5\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9b\u5e38\u898b\u7684SQL\u8a9e\u53e5\u793a\u4f8b\uff1a<\/p>\n<h3 id=\"%e6%96%b0%e5%a2%9e%e6%ac%84%e4%bd%8d-qfFteVONbv\">\u65b0\u589e\u6b04\u4f4d<\/h3>\n<pre><code>ALTER TABLE \u8868\u540d ADD COLUMN \u65b0\u6b04\u4f4d\u540d \u6578\u64da\u985e\u578b;<\/code><\/pre>\n<h3 id=\"%e4%bf%ae%e6%94%b9%e6%ac%84%e4%bd%8d%e9%a1%9e%e5%9e%8b-qfFteVONbv\">\u4fee\u6539\u6b04\u4f4d\u985e\u578b<\/h3>\n<pre><code>ALTER TABLE \u8868\u540d ALTER COLUMN \u6b04\u4f4d\u540d SET DATA TYPE \u65b0\u6578\u64da\u985e\u578b;<\/code><\/pre>\n<h3 id=\"%e5%88%aa%e9%99%a4%e6%ac%84%e4%bd%8d-qfFteVONbv\">\u522a\u9664\u6b04\u4f4d<\/h3>\n<pre><code>ALTER TABLE \u8868\u540d DROP COLUMN 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