{"id":144,"date":"2025-07-16T10:43:14","date_gmt":"2025-07-16T02:43:14","guid":{"rendered":"https:\/\/www.hgfwq.com\/blog\/?p=144"},"modified":"2025-07-16T10:43:14","modified_gmt":"2025-07-16T02:43:14","slug":"oracle-case-when-%e7%94%a8%e6%b3%95%e5%9c%a8%e5%a4%84%e7%90%86%e5%a4%9a%e5%b0%91%e7%a7%8d%e6%9c%8d%e5%8a%a1%e5%99%a8%e9%85%8d%e7%bd%ae%e5%92%8c%e4%bb%b7%e6%a0%bc%e7%9a%84%e6%9f%a5%e8%af%a2%e5%88%86","status":"publish","type":"post","link":"https:\/\/www.hgfwq.com\/blog\/144.html","title":{"rendered":"Oracle CASE WHEN \u7528\u6cd5\u5728\u5904\u7406\u591a\u5c11\u79cd\u670d\u52a1\u5668\u914d\u7f6e\u548c\u4ef7\u683c\u7684\u67e5\u8be2\u5206\u6790\u4e2d\u5e94\u7528"},"content":{"rendered":"

\u4e00\u3001Oracle CASE WHEN \u8bed\u53e5\u7b80\u4ecb<\/h3>\n<\/p>\n

\"Oracle<\/p>\n

Oracle CASE WHEN \u8bed\u53e5\u662f\u4e00\u79cd\u6761\u4ef6\u5224\u65ad\u8bed\u53e5\uff0c\u7528\u4e8e\u6839\u636e\u6761\u4ef6\u8fd4\u56de\u4e0d\u540c\u7684\u503c\u3002\u5b83\u7c7b\u4f3c\u4e8e SQL \u4e2d\u7684 IF-ELSE \u8bed\u53e5\uff0c\u4f46\u5728\u6570\u636e\u5e93\u67e5\u8be2\u4e2d\u66f4\u4e3a\u5e38\u7528\u3002CASE WHEN \u8bed\u53e5\u53ef\u4ee5\u7b80\u5316\u590d\u6742\u7684\u67e5\u8be2\u903b\u8f91\uff0c\u63d0\u9ad8\u4ee3\u7801\u7684\u53ef\u8bfb\u6027\u548c\u53ef\u7ef4\u62a4\u6027\u3002<\/p>\n<\/p>\n

\u4e8c\u3001\u5177\u4f53\u516c\u53f8\u4ea7\u54c1\u4ef7\u683c\u6848\u4f8b\u5206\u6790<\/h3>\n<\/p>\n

\u4ee5\u4e0b\u662f\u4e00\u4e9b\u4e2d\u56fd\u5883\u5185\u516c\u53f8\u7684\u4ea7\u54c1\u4ef7\u683c\u6848\u4f8b\uff0c\u5c55\u793a\u4e86\u5982\u4f55\u4f7f\u7528 Oracle CASE WHEN \u8bed\u53e5\u6765\u5904\u7406\u4ef7\u683c\u95ee\u9898\u3002<\/p>\n<\/p>\n

1. \u534e\u4e3a\u4e91\u670d\u52a1\u5668\u4ef7\u683c<\/h4>\n<\/p>\n

\u534e\u4e3a\u4e91\u670d\u52a1\u5668\u63d0\u4f9b\u591a\u79cd\u914d\u7f6e\u548c\u4ef7\u683c\uff0c\u4ee5\u4e0b\u662f\u4e00\u4e2a\u793a\u4f8b\u67e5\u8be2\uff0c\u6839\u636e\u914d\u7f6e\u4e0d\u540c\u8fd4\u56de\u5bf9\u5e94\u7684\u4ef7\u683c\uff1a<\/p>\n<\/p>\n

<\/p>\r\n
SELECT CASE<\/p>\r\n
    WHEN config = '\u6807\u51c6\u578b' THEN '500\u5143\/\u6708'<\/p>\r\n
    WHEN config = '\u589e\u5f3a\u578b' THEN '800\u5143\/\u6708'<\/p>\r\n
    WHEN config = '\u9ad8\u6027\u80fd\u578b' THEN '1500\u5143\/\u6708'<\/p>\r\n
    ELSE '\u4ef7\u683c\u672a\u77e5'<\/p>\r\n
END AS price<\/p>\r\n
FROM server_config<\/p>\r\n
WHERE config IN ('\u6807\u51c6\u578b', '\u589e\u5f3a\u578b', '\u9ad8\u6027\u80fd\u578b');<\/p>\r\n
<\/pre>\n<\/p>\n
2. \u963f\u91cc\u4e91\u865a\u62df\u4e3b\u673a\u4ef7\u683c<\/h4>\n<\/p>\n
\u963f\u91cc\u4e91\u865a\u62df\u4e3b\u673a\u4e5f\u63d0\u4f9b\u591a\u79cd\u914d\u7f6e\u548c\u4ef7\u683c\uff0c\u4ee5\u4e0b\u662f\u4e00\u4e2a\u793a\u4f8b\u67e5\u8be2\uff0c\u6839\u636e\u914d\u7f6e\u4e0d\u540c\u8fd4\u56de\u5bf9\u5e94\u7684\u4ef7\u683c\uff1a<\/p>\n<\/p>\n
<\/p>\r\n
SELECT CASE<\/p>\r\n
    WHEN config = '\u5165\u95e8\u578b' THEN '100\u5143\/\u5e74'<\/p>\r\n
    WHEN config = '\u6807\u51c6\u578b' THEN '300\u5143\/\u5e74'<\/p>\r\n
    WHEN config = '\u4f01\u4e1a\u578b' THEN '600\u5143\/\u5e74'<\/p>\r\n
    ELSE '\u4ef7\u683c\u672a\u77e5'<\/p>\r\n
END AS price<\/p>\r\n
FROM vps_config<\/p>\r\n
WHERE config IN ('\u5165\u95e8\u578b', '\u6807\u51c6\u578b', '\u4f01\u4e1a\u578b');<\/p>\r\n
<\/pre>\n<\/p>\n
3. \u817e\u8baf\u4e91\u670d\u52a1\u5668\u4ef7\u683c<\/h4>\n<\/p>\n
\u817e\u8baf\u4e91\u670d\u52a1\u5668\u540c\u6837\u63d0\u4f9b\u591a\u79cd\u914d\u7f6e\u548c\u4ef7\u683c\uff0c\u4ee5\u4e0b\u662f\u4e00\u4e2a\u793a\u4f8b\u67e5\u8be2\uff0c\u6839\u636e\u914d\u7f6e\u4e0d\u540c\u8fd4\u56de\u5bf9\u5e94\u7684\u4ef7\u683c\uff1a<\/p>\n<\/p>\n
<\/p>\r\n
SELECT CASE<\/p>\r\n
    WHEN config = '\u57fa\u7840\u578b' THEN '400\u5143\/\u6708'<\/p>\r\n
    WHEN config = '\u6807\u51c6\u578b' THEN '700\u5143\/\u6708'<\/p>\r\n
    WHEN config = '\u9ad8\u6027\u80fd\u578b' THEN '1200\u5143\/\u6708'<\/p>\r\n
    ELSE '\u4ef7\u683c\u672a\u77e5'<\/p>\r\n
END AS price<\/p>\r\n
FROM cloud_server_config<\/p>\r\n
WHERE config IN ('\u57fa\u7840\u578b', '\u6807\u51c6\u578b', '\u9ad8\u6027\u80fd\u578b');<\/p>\r\n
<\/pre>\n<\/p>\n
\u4e09\u3001CASE WHEN \u8bed\u53e5\u5728\u670d\u52a1\u5668\u914d\u7f6e\u4e2d\u7684\u5e94\u7528<\/h3>\n<\/p>\n
CASE WHEN \u8bed\u53e5\u5728\u670d\u52a1\u5668\u914d\u7f6e\u4e2d\u6709\u7740\u5e7f\u6cdb\u7684\u5e94\u7528\uff0c\u4ee5\u4e0b\u662f\u4e00\u4e9b\u5177\u4f53\u573a\u666f\uff1a<\/p>\n<\/p>\n
1. \u6839\u636e\u670d\u52a1\u5668\u914d\u7f6e\u8fd4\u56de\u4e0d\u540c\u5e26\u5bbd\u4ef7\u683c<\/h4>\n<\/p>\n
\u4ee5\u4e0b\u662f\u4e00\u4e2a\u793a\u4f8b\u67e5\u8be2\uff0c\u6839\u636e\u670d\u52a1\u5668\u5e26\u5bbd\u914d\u7f6e\u8fd4\u56de\u5bf9\u5e94\u7684\u4ef7\u683c\uff1a<\/p>\n<\/p>\n
<\/p>\r\n
SELECT CASE<\/p>\r\n
    WHEN bandwidth = '1Mbps' THEN '100\u5143\/\u5e74'<\/p>\r\n
    WHEN bandwidth = '2Mbps' THEN '200\u5143\/\u5e74'<\/p>\r\n
    WHEN bandwidth = '5Mbps' THEN '500\u5143\/\u5e74'<\/p>\r\n
    ELSE '\u4ef7\u683c\u672a\u77e5'<\/p>\r\n
END AS price<\/p>\r\n
FROM bandwidth_config<\/p>\r\n
WHERE bandwidth IN ('1Mbps', '2Mbps', '5Mbps');<\/p>\r\n
<\/pre>\n<\/p>\n
2. \u6839\u636e\u670d\u52a1\u5668\u5185\u5b58\u5927\u5c0f\u8fd4\u56de\u4e0d\u540c\u4ef7\u683c<\/h4>\n<\/p>\n
\u4ee5\u4e0b\u662f\u4e00\u4e2a\u793a\u4f8b\u67e5\u8be2\uff0c\u6839\u636e\u670d\u52a1\u5668\u5185\u5b58\u5927\u5c0f\u8fd4\u56de\u5bf9\u5e94\u7684\u4ef7\u683c\uff1a<\/p>\n<\/p>\n
<\/p>\r\n
SELECT CASE<\/p>\r\n
    WHEN memory = '2GB' THEN '300\u5143\/\u5e74'<\/p>\r\n
    WHEN memory = '4GB' THEN '500\u5143\/\u5e74'<\/p>\r\n
    WHEN memory = '8GB' THEN '800\u5143\/\u5e74'<\/p>\r\n
    ELSE '\u4ef7\u683c\u672a\u77e5'<\/p>\r\n
END AS price<\/p>\r\n
FROM memory_config<\/p>\r\n
WHERE memory IN ('2GB', '4GB', '8GB');<\/p>\r\n
<\/pre>\n<\/p>\n
\u56db\u3001\u95ee\u7b54\u73af\u8282<\/h3>\n<\/p>\n
\u95ee\uff1a<\/b>\u534e\u4e3a\u4e91\u670d\u52a1\u5668\u7684\u6807\u51c6\u578b\u914d\u7f6e\u4ef7\u683c\u662f\u591a\u5c11\uff1f<\/p>\n<\/p>\n
\u7b54\uff1a\u534e\u4e3a\u4e91\u670d\u52a1\u5668\u7684\u6807\u51c6\u578b\u914d\u7f6e\u4ef7\u683c\u4e3a500\u5143\/\u6708\u3002<\/p>\n<\/p>\n
\u95ee\uff1a<\/b>\u963f\u91cc\u4e91\u865a\u62df\u4e3b\u673a\u7684\u5165\u95e8\u578b\u914d\u7f6e\u4ef7\u683c\u662f\u591a\u5c11\uff1f<\/p>\n<\/p>\n
\u7b54\uff1a\u963f\u91cc\u4e91\u865a\u62df\u4e3b\u673a\u7684\u5165\u95e8\u578b\u914d\u7f6e\u4ef7\u683c\u4e3a100\u5143\/\u5e74\u3002<\/p>\n<\/p>\n
\u95ee\uff1a<\/b>\u817e\u8baf\u4e91\u670d\u52a1\u5668\u7684\u9ad8\u6027\u80fd\u578b\u914d\u7f6e\u4ef7\u683c\u662f\u591a\u5c11\uff1f<\/p>\n<\/p>\n
\u7b54\uff1a\u817e\u8baf\u4e91\u670d\u52a1\u5668\u7684\u9ad8\u6027\u80fd\u578b\u914d\u7f6e\u4ef7\u683c\u4e3a1200\u5143\/\u6708\u3002<\/p><\/p>\n","protected":false},"excerpt":{"rendered":"
\u4e00\u3001Oracle CASE WHEN \u8bed\u53e5\u7b80\u4ecb Oracle CASE WHEN \u8bed\u53e5\u662f\u4e00\u79cd\u6761\u4ef6\u5224\u65ad\u8bed\u53e5\uff0c\u7528\u4e8e\u6839\u636e\u6761\u4ef6\u8fd4\u56de\u4e0d\u540c\u7684\u503c\u3002\u5b83\u7c7b\u4f3c\u4e8e SQL \u4e2d\u7684 IF-ELSE \u8bed\u53e5\uff0c\u4f46\u5728\u6570\u636e\u5e93\u67e5\u8be2\u4e2d\u66f4\u4e3a\u5e38\u7528\u3002CASE WHEN \u8bed\u53e5\u53ef\u4ee5\u7b80\u5316\u590d\u6742…<\/p>\n","protected":false},"author":1,"featured_media":145,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[84,83,85],"topic":[],"class_list":["post-144","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-haiwai","tag-case","tag-when","tag-85"],"_links":{"self":[{"href":"https:\/\/www.hgfwq.com\/blog\/wp-json\/wp\/v2\/posts\/144","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.hgfwq.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.hgfwq.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.hgfwq.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.hgfwq.com\/blog\/wp-json\/wp\/v2\/comments?post=144"}],"version-history":[{"count":1,"href":"https:\/\/www.hgfwq.com\/blog\/wp-json\/wp\/v2\/posts\/144\/revisions"}],"predecessor-version":[{"id":147,"href":"https:\/\/www.hgfwq.com\/blog\/wp-json\/wp\/v2\/posts\/144\/revisions\/147"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.hgfwq.com\/blog\/wp-json\/wp\/v2\/media\/145"}],"wp:attachment":[{"href":"https:\/\/www.hgfwq.com\/blog\/wp-json\/wp\/v2\/media?parent=144"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.hgfwq.com\/blog\/wp-json\/wp\/v2\/categories?post=144"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.hgfwq.com\/blog\/wp-json\/wp\/v2\/tags?post=144"},{"taxonomy":"topic","embeddable":true,"href":"https:\/\/www.hgfwq.com\/blog\/wp-json\/wp\/v2\/topic?post=144"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}