{"id":140980,"date":"2024-10-31T21:11:22","date_gmt":"2024-10-31T13:11:22","guid":{"rendered":"https:\/\/server.hk\/cnblog\/140980\/"},"modified":"2024-10-31T21:11:23","modified_gmt":"2024-10-31T13:11:23","slug":"sql-server-%e8%88%87-db2-%e4%bf%ae%e6%94%b9%e6%95%b8%e6%93%9a%e8%a1%a8%e5%88%97%e7%9a%84%e6%93%8d%e4%bd%9c%e5%b0%8d%e6%af%94%e8%88%87%e7%b8%bd%e7%b5%90","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/140980\/","title":{"rendered":"SQL Server \u8207 DB2 \u4fee\u6539\u6578\u64da\u8868\u5217\u7684\u64cd\u4f5c\u5c0d\u6bd4\u8207\u7e3d\u7d50"},"content":{"rendered":"<h1 id=\"sql-server-%e8%88%87-db2-%e4%bf%ae%e6%94%b9%e6%95%b8%e6%93%9a%e8%a1%a8%e5%88%97%e7%9a%84%e6%93%8d%e4%bd%9c%e5%b0%8d%e6%af%94%e8%88%87%e7%b8%bd%e7%b5%90-uKNtgrPeBf\">SQL Server \u8207 DB2 \u4fee\u6539\u6578\u64da\u8868\u5217\u7684\u64cd\u4f5c\u5c0d\u6bd4\u8207\u7e3d\u7d50<\/h1>\n<p>\u5728\u6578\u64da\u5eab\u7ba1\u7406\u7cfb\u7d71\u4e2d\uff0cSQL Server \u548c DB2 \u662f\u5169\u500b\u5ee3\u6cdb\u4f7f\u7528\u7684\u9078\u64c7\u3002\u9019\u5169\u8005\u5728\u6578\u64da\u8868\u7684\u5217\u4fee\u6539\u64cd\u4f5c\u4e0a\u6709\u8457\u4e0d\u540c\u7684\u8a9e\u6cd5\u548c\u7279\u6027\u3002\u672c\u6587\u5c07\u5c0d\u9019\u5169\u7a2e\u6578\u64da\u5eab\u7cfb\u7d71\u5728\u4fee\u6539\u6578\u64da\u8868\u5217\u7684\u64cd\u4f5c\u9032\u884c\u8a73\u7d30\u7684\u5c0d\u6bd4\u8207\u7e3d\u7d50\u3002<\/p>\n<h2 id=\"sql-server-%e7%9a%84%e5%88%97%e4%bf%ae%e6%94%b9%e6%93%8d%e4%bd%9c-uKNtgrPeBf\">SQL Server \u7684\u5217\u4fee\u6539\u64cd\u4f5c<\/h2>\n<p>\u5728 SQL Server \u4e2d\uff0c\u4fee\u6539\u6578\u64da\u8868\u7684\u5217\u53ef\u4ee5\u4f7f\u7528 <code>ALTER TABLE<\/code> \u8a9e\u53e5\u3002\u9019\u500b\u8a9e\u53e5\u5141\u8a31\u7528\u6236\u6dfb\u52a0\u3001\u522a\u9664\u6216\u4fee\u6539\u8868\u4e2d\u7684\u5217\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9b\u5e38\u898b\u7684\u64cd\u4f5c\u793a\u4f8b\uff1a<\/p>\n<h3 id=\"%e4%bf%ae%e6%94%b9%e5%88%97%e7%9a%84%e6%95%b8%e6%93%9a%e9%a1%9e%e5%9e%8b-uKNtgrPeBf\">\u4fee\u6539\u5217\u7684\u6578\u64da\u985e\u578b<\/h3>\n<pre><code>ALTER TABLE \u8868\u540d\nALTER COLUMN \u5217\u540d \u65b0\u6578\u64da\u985e\u578b;<\/code><\/pre>\n<p>\u4f8b\u5982\uff0c\u5982\u679c\u6211\u5011\u60f3\u5c07\u540d\u70ba <code>age<\/code> \u7684\u5217\u5f9e <code>INT<\/code> \u4fee\u6539\u70ba <code>SMALLINT<\/code>\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u8a9e\u53e5\uff1a<\/p>\n<pre><code>ALTER TABLE Users\nALTER COLUMN age SMALLINT;<\/code><\/pre>\n<h3 id=\"%e6%b7%bb%e5%8a%a0%e6%96%b0%e5%88%97-uKNtgrPeBf\">\u6dfb\u52a0\u65b0\u5217<\/h3>\n<pre><code>ALTER TABLE \u8868\u540d\nADD \u5217\u540d \u6578\u64da\u985e\u578b;<\/code><\/pre>\n<p>\u4f8b\u5982\uff0c\u6dfb\u52a0\u4e00\u500b\u540d\u70ba <code>email<\/code> \u7684\u65b0\u5217\uff1a<\/p>\n<pre><code>ALTER TABLE Users\nADD email VARCHAR(255);<\/code><\/pre>\n<h3 id=\"%e5%88%aa%e9%99%a4%e5%88%97-uKNtgrPeBf\">\u522a\u9664\u5217<\/h3>\n<pre><code>ALTER TABLE \u8868\u540d\nDROP COLUMN \u5217\u540d;<\/code><\/pre>\n<p>\u4f8b\u5982\uff0c\u522a\u9664\u540d\u70ba <code>email<\/code> \u7684\u5217\uff1a<\/p>\n<pre><code>ALTER TABLE Users\nDROP COLUMN email;<\/code><\/pre>\n<h2 id=\"db2-%e7%9a%84%e5%88%97%e4%bf%ae%e6%94%b9%e6%93%8d%e4%bd%9c-uKNtgrPeBf\">DB2 \u7684\u5217\u4fee\u6539\u64cd\u4f5c<\/h2>\n<p>\u5728 DB2 \u4e2d\uff0c\u4fee\u6539\u6578\u64da\u8868\u7684\u5217\u540c\u6a23\u4f7f\u7528 <code>ALTER TABLE<\/code> \u8a9e\u53e5\uff0c\u4f46\u5176\u8a9e\u6cd5\u548c SQL Server \u6709\u6240\u4e0d\u540c\u3002\u4ee5\u4e0b\u662f DB2 \u4e2d\u7684\u5e38\u898b\u64cd\u4f5c\u793a\u4f8b\uff1a<\/p>\n<h3 id=\"%e4%bf%ae%e6%94%b9%e5%88%97%e7%9a%84%e6%95%b8%e6%93%9a%e9%a1%9e%e5%9e%8b-uKNtgrPeBf\">\u4fee\u6539\u5217\u7684\u6578\u64da\u985e\u578b<\/h3>\n<pre><code>ALTER TABLE \u8868\u540d\nALTER COLUMN \u5217\u540d SET DATA TYPE \u65b0\u6578\u64da\u985e\u578b;<\/code><\/pre>\n<p>\u4f8b\u5982\uff0c\u5c07 <code>age<\/code> \u5217\u7684\u6578\u64da\u985e\u578b\u5f9e <code>INTEGER<\/code> \u4fee\u6539\u70ba <code>SMALLINT<\/code>\uff1a<\/p>\n<pre><code>ALTER TABLE Users\nALTER COLUMN age SET DATA TYPE SMALLINT;<\/code><\/pre>\n<h3 id=\"%e6%b7%bb%e5%8a%a0%e6%96%b0%e5%88%97-uKNtgrPeBf\">\u6dfb\u52a0\u65b0\u5217<\/h3>\n<pre><code>ALTER TABLE \u8868\u540d\nADD \u5217\u540d \u6578\u64da\u985e\u578b;<\/code><\/pre>\n<p>\u4f8b\u5982\uff0c\u6dfb\u52a0\u4e00\u500b\u540d\u70ba <code>email<\/code> \u7684\u65b0\u5217\uff1a<\/p>\n<pre><code>ALTER TABLE Users\nADD email VARCHAR(255);<\/code><\/pre>\n<h3 id=\"%e5%88%aa%e9%99%a4%e5%88%97-uKNtgrPeBf\">\u522a\u9664\u5217<\/h3>\n<pre><code>ALTER TABLE \u8868\u540d\nDROP COLUMN \u5217\u540d;<\/code><\/pre>\n<p>\u4f8b\u5982\uff0c\u522a\u9664\u540d\u70ba <code>email<\/code> \u7684\u5217\uff1a<\/p>\n<pre><code>ALTER TABLE Users\nDROP COLUMN email;<\/code><\/pre>\n<h2 id=\"sql-server-%e8%88%87-db2-%e7%9a%84%e6%93%8d%e4%bd%9c%e5%b0%8d%e6%af%94-uKNtgrPeBf\">SQL Server \u8207 DB2 \u7684\u64cd\u4f5c\u5c0d\u6bd4<\/h2>\n<p>\u5f9e\u4e0a\u8ff0\u793a\u4f8b\u53ef\u4ee5\u770b\u51fa\uff0cSQL Server \u548c DB2 \u5728\u4fee\u6539\u6578\u64da\u8868\u5217\u7684\u57fa\u672c\u64cd\u4f5c\u4e0a\u6709\u76f8\u4f3c\u4e4b\u8655\uff0c\u4f46\u5728\u8a9e\u6cd5\u4e0a\u5b58\u5728\u4e00\u4e9b\u5dee\u7570\u3002\u4ee5\u4e0b\u662f\u4e3b\u8981\u7684\u5c0d\u6bd4\u9ede\uff1a<\/p>\n<ul>\n<li><strong>\u4fee\u6539\u6578\u64da\u985e\u578b\uff1a<\/strong>SQL Server \u4f7f\u7528 <code>ALTER COLUMN \u5217\u540d \u65b0\u6578\u64da\u985e\u578b<\/code>\uff0c\u800c DB2 \u5247\u4f7f\u7528 <code>ALTER COLUMN \u5217\u540d SET DATA TYPE \u65b0\u6578\u64da\u985e\u578b<\/code>\u3002<\/li>\n<li><strong>\u6dfb\u52a0\u65b0\u5217\uff1a<\/strong>\u5169\u8005\u7684\u8a9e\u6cd5\u76f8\u4f3c\uff0c\u5747\u4f7f\u7528 <code>ADD \u5217\u540d \u6578\u64da\u985e\u578b<\/code>\u3002<\/li>\n<li><strong>\u522a\u9664\u5217\uff1a<\/strong>\u5169\u8005\u7684\u8a9e\u6cd5\u4e5f\u76f8\u4f3c\uff0c\u5747\u4f7f\u7528 <code>DROP COLUMN \u5217\u540d<\/code>\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b8%bd%e7%b5%90-uKNtgrPeBf\">\u7e3d\u7d50<\/h2>\n<p>\u5728 SQL Server \u548c DB2 \u4e2d\uff0c\u4fee\u6539\u6578\u64da\u8868\u5217\u7684\u64cd\u4f5c\u96d6\u7136\u6709\u76f8\u4f3c\u4e4b\u8655\uff0c\u4f46\u5728\u8a9e\u6cd5\u4e0a\u5b58\u5728\u4e00\u4e9b\u7d30\u5fae\u7684\u5dee\u7570\u3002\u4e86\u89e3\u9019\u4e9b\u5dee\u7570\u5c0d\u65bc\u6578\u64da\u5eab\u7ba1\u7406\u8005\u548c\u958b\u767c\u8005\u4f86\u8aaa\u662f\u975e\u5e38\u91cd\u8981\u7684\uff0c\u56e0\u70ba\u9019\u5c07\u5f71\u97ff\u5230\u4ed6\u5011\u5728\u4e0d\u540c\u6578\u64da\u5eab\u7cfb\u7d71\u4e2d\u7684\u64cd\u4f5c\u6548\u7387\u548c\u6e96\u78ba\u6027\u3002<\/p>\n<p>\u5982\u679c\u60a8\u6b63\u5728\u5c0b\u627e\u9ad8\u6548\u7684 <a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a> \u89e3\u6c7a\u65b9\u6848\uff0c\u7121\u8ad6\u662f\u7528\u65bc SQL Server \u9084\u662f DB2\uff0cServer.HK \u63d0\u4f9b\u4e86\u591a\u7a2e\u9078\u64c7\uff0c\u6eff\u8db3\u4e0d\u540c\u7528\u6236\u7684\u9700\u6c42\u3002\u7121\u8ad6\u662f\u4f01\u696d\u7d1a\u61c9\u7528\u9084\u662f\u500b\u4eba\u9805\u76ee\uff0c\u6211\u5011\u7684 <a href=\"https:\/\/server.hk\">\u9999\u6e2f\u4f3a\u670d\u5668<\/a> \u90fd\u80fd\u70ba\u60a8\u63d0\u4f9b\u7a69\u5b9a\u7684\u652f\u6301\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u6bd4\u8f03 SQL Server \u8207 DB2 \u5728\u4fee\u6539\u6578\u64da\u8868\u5217\u7684\u64cd\u4f5c\uff0c\u7e3d\u7d50\u5176\u7570\u540c\u8207\u6700\u4f73\u5be6\u8e10\uff0c\u52a9\u60a8\u9078\u64c7\u5408\u9069\u7684\u6578\u64da\u5eab\u7ba1\u7406\u65b9\u6848\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-140980","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/140980","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=140980"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/140980\/revisions"}],"predecessor-version":[{"id":140981,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/140980\/revisions\/140981"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=140980"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=140980"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=140980"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}