{"id":2211,"date":"2020-09-29T15:53:47","date_gmt":"2020-09-29T06:53:47","guid":{"rendered":"https:\/\/www.dbsheetclient.jp\/blog\/?p=2211"},"modified":"2020-09-29T15:53:47","modified_gmt":"2020-09-29T06:53:47","slug":"case%e5%bc%8f%e3%82%92where%e5%8f%a5%e3%81%a7%e4%bd%bf%e3%81%86%ef%bc%88sql-server%ef%bc%89","status":"publish","type":"post","link":"https:\/\/www.dbsheetclient.jp\/blog\/?p=2211","title":{"rendered":"CASE\u5f0f\u3092WHERE\u53e5\u3067\u4f7f\u3046\uff08SQL Server\uff09"},"content":{"rendered":"

IT\u30b3\u30fc\u30c7\u30a3\u30cd\u30fc\u30bf\u306e\u30b7\u30e5\u30a6\u3067\u3059\u3002<\/p>\n

\"IMG_3316\"<\/a><\/p>\n

\u304a\u4e45\u3057\u3076\u308a\u3067\u3059\u3002\u5199\u771f\u306f\u59bb\u304c\u8cb7\u3063\u3066\u304d\u3066\u5bb6\u306b\u7f6e\u3044\u3066\u3044\u305f\u30cf\u30a4\u30d3\u30b9\u30ab\u30b9\u3068\u3044\u3046\u82b1\u304c\u7dba\u9e97\u306b\u54b2\u3044\u305f\u3068\u3053\u308d\u3092\u64ae\u3063\u305f\u3082\u306e\u3067\u3059\u3002\u30cf\u30a4\u30d3\u30b9\u30ab\u30b9\u306f\u82b1\u306e\u8272\u306b\u3088\u3063\u3066\u82b1\u8a00\u8449\u304c\u9055\u3046\u3088\u3046\u3067\u3059\u306d\u3002\u767d\u306f\u300c\u8276\u7f8e\u300d\u3001\u30d4\u30f3\u30af\u306f\u300c\u83ef\u3084\u304b\u300d\u3001\u9ec4\u8272\u306f\u300c\u8f1d\u304d\u300d\u3001\u8d64\u306f\u300c\u52c7\u6562\u300d\u3068\u306e\u3053\u3068\u3002
\u5bb6\u306b\u82b1\u304c\u3042\u308b\u306e\u306f\u3044\u3044\u3082\u306e\u3067\u3059\u306d\u3002\u3042\u307e\u308a\u82b1\u3068\u304b\u306b\u8208\u5473\u304c\u306a\u304b\u3063\u305f\u79c1\u3067\u3057\u305f\u304c\u3001\u59bb\u306e\u304a\u304b\u3052\u3067\u81ea\u7136\u306e\u7f8e\u3057\u3055\u3092\u610f\u8b58\u3059\u308b\u3053\u3068\u304c\u591a\u304f\u306a\u3063\u305f\u3068\u611f\u8b1d\u3057\u3066\u3044\u307e\u3059\u3002
\u4e00\u751f\u61f8\u547d\u306b\u54b2\u3044\u3066\u7f8e\u3092\u8868\u308f\u305d\u3046\u3068\u3059\u308b\u82b1\u306e\u3088\u3046\u306b\u3001\u79c1\u305f\u3061\u3082\u60c5\u71b1\u3092\u3082\u3063\u3066\u4e00\u751f\u61f8\u547d\u306b\u751f\u304d\u3066\u3044\u304d\u305f\u3044\u3082\u306e\u3067\u3059\u3002<\/p>\n

\u305d\u308c\u304b\u3089\u3001dbSheetClient\u306e\u30d6\u30ed\u30b0\u306b\u3001\u306f\u308b\u30d1\u30d1\u3055\u3093\u306edbSheetClient\u5343\u591c\u4e00\u591c\u3068\u3044\u3046\u30d6\u30ed\u30b0\u304c\u3067\u304d\u3066\u3044\u307e\u3059\u3002\u662f\u975e\u305d\u3061\u3089\u3082\u3054\u89a7\u304f\u3060\u3055\u3044\u3002
https:\/\/www.newcom07.jp\/dbsheetclient\/dbsc-blog\/
<\/p>\n

<\/strong><\/a>\uff1c\u672c\u65e5\u306e\u984c\u6750\uff1e<\/strong>
<\/strong><\/a>CASE<\/strong>\u5f0f\u3092WHERE<\/strong>\u53e5\u3067\u4f7f\u3046\uff08SQL Server<\/strong>\uff09<\/p>\n

<\/strong>CASE WHEN\u306e\u5f0f\u3092\u3001\u4ee5\u524d\u3001SELECT\u6587\u3067\u4f7f\u7528\u3059\u308b\u30b5\u30f3\u30d7\u30eb\u306f\u4f55\u5ea6\u304b\u30d6\u30ed\u30b0\u3067\u53d6\u308a\u4e0a\u3052\u307e\u3057\u305f\u304c\u3001WHERE\u53e5\u306e\u4e2d\u3067\u3001\u30b1\u30fc\u30b9\u306b\u3088\u3063\u3066\u6761\u4ef6\u6587\u81ea\u4f53\u3092\u5909\u66f4\u3057\u305f\u3044\u3068\u3044\u3046\u5834\u5408\u306e\u3084\u308a\u65b9\u3092\u4eca\u56de\u8a66\u3057\u3066\u307f\u305f\u3044\u3068\u601d\u3044\u307e\u3059\u3002<\/p>\n

\u4f8b)
\u691c\u7d22\u7528\u306e\u9805\u76ee\u3092\u8a2d\u5b9a\u3057\u3001\u305d\u3053\u306b\u5024\u3092\u8a2d\u5b9a\u3059\u308c\u3070\u3001\u305d\u306e\u9805\u76ee\u306b\u5bfe\u3057\u3066\u306f\u6307\u5b9a\u3057\u305f\u5024\u3067\u691c\u7d22\u3059\u308b\u304c\u3001\u4f55\u3082\u8a2d\u5b9a\u3057\u306a\u3051\u308c\u3070\u3001\u305d\u306e\u9805\u76ee\u306b\u5bfe\u3057\u3066\u306f\u6761\u4ef6\u3092\u8a2d\u5b9a\u305b\u305a\u306b\u62bd\u51fa\u3092\u884c\u3044\u305f\u3044\u3068\u3044\u3046\u30b1\u30fc\u30b9\u306f\u3088\u304f\u3042\u308b\u3068\u601d\u3044\u307e\u3059\u3002<\/p>\n

\u4eca\u56de\u306f\u7c21\u5358\u306a\u30b1\u30fc\u30b9\u3068\u3057\u3066\u3001\u793e\u54e1\u30de\u30b9\u30bf\u306e\u691c\u7d22\u306e\u969b\u306b\u3001\u300c\u793e\u54e1\u756a\u53f7\u300d\u300c\u793e\u54e1\u540d\u300d\u300c\u62e0\u70b9\u300d\u306e\u691c\u7d22\u9805\u76ee\u306b\u5bfe\u3057\u3066\u3001\u8a2d\u5b9a\u3057\u305f\u5185\u5bb9\u304c\u3042\u308c\u3070\u305d\u306e\u5024\u3067\u691c\u7d22\u3057\u3001\u306a\u3051\u308c\u3070\u6761\u4ef6\u3068\u3057\u3066\u306f\u52a0\u3048\u306a\u3044\u304b\u305f\u3061\u306e\u4f8b\u3092\u53d6\u308a\u4e0a\u3052\u3066\u307f\u305f\u3044\u3068\u601d\u3044\u307e\u3059\u3002<\/p>\n

\u4e0a\u8a18\u306e3\u9805\u76ee\u3092\u30d1\u30e9\u30e1\u30fc\u30bf\u3068\u3057\u3066\u6e21\u3057\u3001\u5024\u304c NULL \u3067\u306a\u3051\u308c\u3070\u305d\u306e\u5024\u3092\u6761\u4ef6\u3068\u3059\u308b\u304c\u3001NULL\u306e\u5834\u5408\u306b\u306f\u6761\u4ef6\u306b\u52a0\u3048\u306a\u3044\u3068\u3044\u3046\u304b\u305f\u3061\u306b\u3057\u307e\u3059\u3002<\/p>\n

\u4f8b\u3048\u3070\u3001\u793e\u54e1\u756a\u53f7\u3001\u793e\u54e1\u540d\u306f\u4f55\u3082\u5024\u3092\u8a2d\u5b9a\u305b\u305a\u3001\u62e0\u70b9\u3092\u300c\u30cb\u30e5\u30fc\u30e8\u30fc\u30af\u300d\u3068\u3057\u3066\u691c\u7d22\u3057\u305f\u3044\u5834\u5408\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u8a2d\u5b9a\u3067\u304d\u307e\u3059\u3002<\/p>\n

— \u5909\u6570\u3092\u5b9a\u7fa9
DECLARE
\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 @\u793e\u54e1\u756a\u53f7\u00a0\u00a0\u00a0\u00a0 DECIMAL(5),
\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 @\u793e\u54e1\u540d\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 NVARCHAR(20),
\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 @\u62e0\u70b9\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 NVARCHAR(20);<\/p>\n

–\u5909\u6570\u8a2d\u5b9a\uff1a\u753b\u9762\u3067\u9078\u629e\u3057\u305f\u5024\u304c\u30bb\u30c3\u30c8\u3055\u308c\u308b\u3088\u3046\u306b\u3057\u307e\u3059
SET @\u793e\u54e1\u756a\u53f7 = NULL;
SET @\u793e\u54e1\u540d = NULL;
SET @\u62e0\u70b9 = ‘\u30cb\u30e5\u30fc\u30e8\u30fc\u30af’ ;<\/p>\n

–\u793e\u54e1\u30de\u30b9\u30bf\u691c\u7d22
SELECT * FROM dbo.\u793e\u54e1\u30de\u30b9\u30bf
WHERE 1=1
AND \u793e\u54e1\u756a\u53f7 = CASE WHEN @\u793e\u54e1\u756a\u53f7 IS NULL THEN \u793e\u54e1\u756a\u53f7 ELSE @\u793e\u54e1\u756a\u53f7 END
AND \u793e\u54e1\u540d = CASE WHEN @\u793e\u54e1\u540d IS NULL THEN \u793e\u54e1\u540d ELSE @\u793e\u54e1\u540d END
AND \u62e0\u70b9 = CASE WHEN @\u62e0\u70b9 IS NULL THEN \u62e0\u70b9 ELSE @\u62e0\u70b9 END;<\/p>\n

\"SQL1\"<\/a><\/p>\n

\u4e0a\u8a18\u306f\u3001\u62e0\u70b9\u304c\u300c\u30cb\u30e5\u30fc\u30e8\u30fc\u30af\u300d\u306e\u793e\u54e1\u3092\u5168\u3066\u62bd\u51fa\u3057\u3066\u304d\u307e\u3059\u3002
\u3082\u3061\u308d\u3093\u3001\u793e\u54e1\u540d\u306b\u3082\u5024\u3092\u8a2d\u5b9a\u3059\u308c\u3070\uff12\u3064\u306e\u6761\u4ef6\u3067\u62bd\u51fa\u3059\u308b\u3053\u3068\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n

\"SQL2\"<\/a><\/p>\n

\u00a0\u7d50\u679c\u306f\u30012\u3064\u306e\u6761\u4ef6\u3092\u6e80\u305f\u3059\u30c7\u30fc\u30bf\u306e\u307f\u304c\u62bd\u51fa\u3055\u308c\u308b\u3053\u3068\u3092\u78ba\u8a8d\u3067\u304d\u307e\u3057\u305f\u3002<\/p>\n

\u4eca\u65e5\u306f\u4ee5\u4e0a\u307e\u3067<\/p>\n","protected":false},"excerpt":{"rendered":"

IT\u30b3\u30fc\u30c7\u30a3\u30cd\u30fc\u30bf\u306e\u30b7\u30e5\u30a6\u3067\u3059\u3002 \u304a\u4e45\u3057\u3076\u308a\u3067\u3059\u3002\u5199\u771f\u306f\u59bb\u304c\u8cb7\u3063\u3066\u304d\u3066\u5bb6\u306b\u7f6e\u3044\u3066\u3044\u305f\u30cf\u30a4\u30d3\u30b9\u30ab\u30b9\u3068\u3044\u3046\u82b1\u304c\u7dba\u9e97\u306b\u54b2\u3044\u305f\u3068\u3053\u308d\u3092\u64ae\u3063\u305f\u3082\u306e\u3067\u3059\u3002\u30cf\u30a4\u30d3\u30b9\u30ab\u30b9\u306f\u82b1\u306e\u8272\u306b\u3088\u3063\u3066\u82b1\u8a00\u8449\u304c\u9055\u3046\u3088\u3046\u3067\u3059\u306d\u3002\u767d\u306f\u300c\u8276\u7f8e\u300d\u3001\u30d4\u30f3\u30af\u306f\u300c\u83ef […]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":false,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"enabled":false},"version":2}},"categories":[2],"tags":[],"class_list":["post-2211","post","type-post","status-publish","format-standard","hentry","category-sql"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/www.dbsheetclient.jp\/blog\/index.php?rest_route=\/wp\/v2\/posts\/2211","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.dbsheetclient.jp\/blog\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.dbsheetclient.jp\/blog\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.dbsheetclient.jp\/blog\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.dbsheetclient.jp\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=2211"}],"version-history":[{"count":4,"href":"https:\/\/www.dbsheetclient.jp\/blog\/index.php?rest_route=\/wp\/v2\/posts\/2211\/revisions"}],"predecessor-version":[{"id":2218,"href":"https:\/\/www.dbsheetclient.jp\/blog\/index.php?rest_route=\/wp\/v2\/posts\/2211\/revisions\/2218"}],"wp:attachment":[{"href":"https:\/\/www.dbsheetclient.jp\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=2211"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.dbsheetclient.jp\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=2211"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.dbsheetclient.jp\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=2211"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}