{"id":60395,"date":"2024-10-13T02:30:16","date_gmt":"2024-10-12T18:30:16","guid":{"rendered":"https:\/\/server.hk\/cnblog\/60395\/"},"modified":"2024-10-13T02:30:16","modified_gmt":"2024-10-12T18:30:16","slug":"db2%e8%a1%a8%e7%ae%a1%e7%90%86%e8%aa%9e%e5%8f%a5","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/60395\/","title":{"rendered":"DB2\u8868\u7ba1\u7406\u8a9e\u53e5"},"content":{"rendered":"<h1 id=\"db2%e8%a1%a8%e7%ae%a1%e7%90%86%e8%aa%9e%e5%8f%a5-wTPIzIsBRT\">DB2\u8868\u7ba1\u7406\u8a9e\u53e5<\/h1>\n<p>\u5728\u6578\u64da\u5eab\u7ba1\u7406\u7cfb\u7d71\u4e2d\uff0c\u8868\u662f\u5b58\u5132\u6578\u64da\u7684\u57fa\u672c\u55ae\u4f4d\u3002IBM\u7684DB2\u6578\u64da\u5eab\u7cfb\u7d71\u63d0\u4f9b\u4e86\u4e00\u7cfb\u5217\u7684\u8868\u7ba1\u7406\u8a9e\u53e5\uff0c\u9019\u4e9b\u8a9e\u53e5\u4f7f\u5f97\u7528\u6236\u80fd\u5920\u6709\u6548\u5730\u5275\u5efa\u3001\u4fee\u6539\u548c\u7ba1\u7406\u6578\u64da\u8868\u3002\u672c\u6587\u5c07\u6df1\u5165\u63a2\u8a0eDB2\u4e2d\u7684\u8868\u7ba1\u7406\u8a9e\u53e5\uff0c\u5305\u62ec\u5275\u5efa\u8868\u3001\u4fee\u6539\u8868\u7d50\u69cb\u3001\u522a\u9664\u8868\u4ee5\u53ca\u67e5\u8a62\u8868\u7684\u76f8\u95dc\u4fe1\u606f\u3002<\/p>\n<h2 id=\"%e5%89%b5%e5%bb%ba%e8%a1%a8-wTPIzIsBRT\">\u5275\u5efa\u8868<\/h2>\n<p>\u5728DB2\u4e2d\uff0c\u5275\u5efa\u8868\u7684\u57fa\u672c\u8a9e\u6cd5\u5982\u4e0b\uff1a<\/p>\n<pre><code>CREATE TABLE \u8868\u540d (\n    \u5217\u540d1 \u6578\u64da\u985e\u578b [\u7d04\u675f\u689d\u4ef6],\n    \u5217\u540d2 \u6578\u64da\u985e\u578b [\u7d04\u675f\u689d\u4ef6],\n    ...\n);<\/code><\/pre>\n<p>\u4f8b\u5982\uff0c\u82e5\u8981\u5275\u5efa\u4e00\u500b\u540d\u70ba\u201c\u5b78\u751f\u201d\u7684\u8868\uff0c\u5305\u542b\u201c\u5b78\u865f\u201d\u3001\u201c\u59d3\u540d\u201d\u548c\u201c\u5e74\u9f61\u201d\u4e09\u500b\u5b57\u6bb5\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u8a9e\u53e5\uff1a<\/p>\n<pre><code>CREATE TABLE \u5b78\u751f (\n    \u5b78\u865f INT PRIMARY KEY,\n    \u59d3\u540d VARCHAR(100),\n    \u5e74\u9f61 INT\n);<\/code><\/pre>\n<h2 id=\"%e4%bf%ae%e6%94%b9%e8%a1%a8%e7%b5%90%e6%a7%8b-wTPIzIsBRT\">\u4fee\u6539\u8868\u7d50\u69cb<\/h2>\n<p>\u5728DB2\u4e2d\uff0c\u4fee\u6539\u8868\u7d50\u69cb\u7684\u8a9e\u6cd5\u4e3b\u8981\u4f7f\u7528ALTER TABLE\u8a9e\u53e5\u3002\u9019\u53ef\u4ee5\u7528\u4f86\u6dfb\u52a0\u3001\u522a\u9664\u6216\u4fee\u6539\u5217\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9b\u5e38\u898b\u7684\u64cd\u4f5c\uff1a<\/p>\n<h3 id=\"%e6%b7%bb%e5%8a%a0%e5%88%97-wTPIzIsBRT\">\u6dfb\u52a0\u5217<\/h3>\n<p>\u8981\u5411\u73fe\u6709\u8868\u4e2d\u6dfb\u52a0\u65b0\u5217\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u8a9e\u6cd5\uff1a<\/p>\n<pre><code>ALTER TABLE \u8868\u540d ADD \u5217\u540d \u6578\u64da\u985e\u578b;<\/code><\/pre>\n<p>\u4f8b\u5982\uff0c\u82e5\u8981\u5728\u201c\u5b78\u751f\u201d\u8868\u4e2d\u6dfb\u52a0\u4e00\u500b\u201c\u6027\u5225\u201d\u5217\uff0c\u53ef\u4ee5\u4f7f\u7528\uff1a<\/p>\n<pre><code>ALTER TABLE \u5b78\u751f ADD \u6027\u5225 CHAR(1);<\/code><\/pre>\n<h3 id=\"%e5%88%aa%e9%99%a4%e5%88%97-wTPIzIsBRT\">\u522a\u9664\u5217<\/h3>\n<p>\u8981\u522a\u9664\u8868\u4e2d\u7684\u5217\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u8a9e\u6cd5\uff1a<\/p>\n<pre><code>ALTER TABLE \u8868\u540d DROP \u5217\u540d;<\/code><\/pre>\n<p>\u4f8b\u5982\uff0c\u82e5\u8981\u522a\u9664\u201c\u5b78\u751f\u201d\u8868\u4e2d\u7684\u201c\u5e74\u9f61\u201d\u5217\uff0c\u53ef\u4ee5\u4f7f\u7528\uff1a<\/p>\n<pre><code>ALTER TABLE \u5b78\u751f DROP \u5e74\u9f61;<\/code><\/pre>\n<h3 id=\"%e4%bf%ae%e6%94%b9%e5%88%97-wTPIzIsBRT\">\u4fee\u6539\u5217<\/h3>\n<p>\u82e5\u8981\u4fee\u6539\u5217\u7684\u6578\u64da\u985e\u578b\u6216\u7d04\u675f\u689d\u4ef6\uff0c\u53ef\u4ee5\u4f7f\u7528\uff1a<\/p>\n<pre><code>ALTER TABLE \u8868\u540d ALTER COLUMN \u5217\u540d SET DATA TYPE \u65b0\u6578\u64da\u985e\u578b;<\/code><\/pre>\n<p>\u4f8b\u5982\uff0c\u82e5\u8981\u5c07\u201c\u59d3\u540d\u201d\u5217\u7684\u6578\u64da\u985e\u578b\u6539\u70baVARCHAR(200)\uff0c\u53ef\u4ee5\u4f7f\u7528\uff1a<\/p>\n<pre><code>ALTER TABLE \u5b78\u751f ALTER COLUMN \u59d3\u540d SET DATA TYPE VARCHAR(200);<\/code><\/pre>\n<h2 id=\"%e5%88%aa%e9%99%a4%e8%a1%a8-wTPIzIsBRT\">\u522a\u9664\u8868<\/h2>\n<p>\u82e5\u8981\u522a\u9664\u6574\u500b\u8868\uff0c\u53ef\u4ee5\u4f7f\u7528DROP TABLE\u8a9e\u53e5\u3002\u9019\u5c07\u6c38\u4e45\u522a\u9664\u8868\u53ca\u5176\u6240\u6709\u6578\u64da\uff1a<\/p>\n<pre><code>DROP TABLE \u8868\u540d;<\/code><\/pre>\n<p>\u4f8b\u5982\uff0c\u82e5\u8981\u522a\u9664\u201c\u5b78\u751f\u201d\u8868\uff0c\u53ef\u4ee5\u4f7f\u7528\uff1a<\/p>\n<pre><code>DROP TABLE \u5b78\u751f;<\/code><\/pre>\n<h2 id=\"%e6%9f%a5%e8%a9%a2%e8%a1%a8%e4%bf%a1%e6%81%af-wTPIzIsBRT\">\u67e5\u8a62\u8868\u4fe1\u606f<\/h2>\n<p>DB2\u63d0\u4f9b\u4e86\u7cfb\u7d71\u76ee\u9304\u8996\u5716\uff0c\u5141\u8a31\u7528\u6236\u67e5\u8a62\u8868\u7684\u7d50\u69cb\u548c\u5c6c\u6027\u3002\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u8a9e\u53e5\u67e5\u8a62\u7279\u5b9a\u8868\u7684\u5217\u4fe1\u606f\uff1a<\/p>\n<pre><code>SELECT * FROM SYSIBM.SYSCOLUMNS WHERE TABNAME = '\u8868\u540d';<\/code><\/pre>\n<p>\u4f8b\u5982\uff0c\u82e5\u8981\u67e5\u8a62\u201c\u5b78\u751f\u201d\u8868\u7684\u5217\u4fe1\u606f\uff0c\u53ef\u4ee5\u4f7f\u7528\uff1a<\/p>\n<pre><code>SELECT * FROM SYSIBM.SYSCOLUMNS WHERE TABNAME = '\u5b78\u751f';<\/code><\/pre>\n<h2 id=\"%e7%b8%bd%e7%b5%90-wTPIzIsBRT\">\u7e3d\u7d50<\/h2>\n<p>DB2\u7684\u8868\u7ba1\u7406\u8a9e\u53e5\u70ba\u7528\u6236\u63d0\u4f9b\u4e86\u9748\u6d3b\u7684\u6578\u64da\u7ba1\u7406\u80fd\u529b\uff0c\u7121\u8ad6\u662f\u5275\u5efa\u3001\u4fee\u6539\u9084\u662f\u522a\u9664\u8868\uff0c\u5747\u53ef\u901a\u904e\u7c21\u55ae\u7684SQL\u8a9e\u53e5\u5be6\u73fe\u3002\u638c\u63e1\u9019\u4e9b\u57fa\u672c\u8a9e\u53e5\u5c0d\u65bc\u6578\u64da\u5eab\u7ba1\u7406\u81f3\u95dc\u91cd\u8981\uff0c\u80fd\u5920\u5e6b\u52a9\u7528\u6236\u66f4\u6709\u6548\u5730\u7ba1\u7406\u6578\u64da\u3002<\/p>\n<p>\u5982\u679c\u60a8\u6b63\u5728\u5c0b\u627e\u9ad8\u6548\u7684 <a href=\"https:\/\/server.hk\">VPS<\/a> \u89e3\u6c7a\u65b9\u6848\uff0cServer.HK \u63d0\u4f9b\u591a\u7a2e\u9078\u64c7\uff0c\u9069\u5408\u5404\u7a2e\u9700\u6c42\u3002\u7121\u8ad6\u662f <a href=\"https:\/\/server.hk\">\u9999\u6e2f\u4f3a\u670d\u5668<\/a> \u9084\u662f <a href=\"https:\/\/server.hk\">\u4e91\u4f3a\u670d\u5668<\/a>\uff0c\u6211\u5011\u90fd\u80fd\u70ba\u60a8\u63d0\u4f9b\u7a69\u5b9a\u7684\u670d\u52d9\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u63a2\u7d22DB2\u8868\u7ba1\u7406\u8a9e\u53e5\uff0c\u5b78\u7fd2\u5982\u4f55\u6709\u6548\u5275\u5efa\u3001\u4fee\u6539\u548c\u522a\u9664\u6578\u64da\u8868\uff0c\u63d0\u5347\u6578\u64da\u5eab\u7ba1\u7406\u6548\u7387\u3002<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[101],"tags":[],"class_list":["post-60395","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/60395","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"}],"author":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=60395"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/60395\/revisions"}],"predecessor-version":[{"id":60396,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/60395\/revisions\/60396"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=60395"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=60395"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=60395"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}