{"id":2225,"date":"2011-05-31T20:51:50","date_gmt":"2011-05-31T11:51:50","guid":{"rendered":"http:\/\/www.moonmile.net\/blog\/?p=2225"},"modified":"2011-05-31T20:51:50","modified_gmt":"2011-05-31T11:51:50","slug":"select-%e3%81%ae%e3%83%91%e3%83%95%e3%82%a9%e3%83%bc%e3%83%9e%e3%83%b3%e3%82%b9%e3%83%81%e3%83%a5%e3%83%bc%e3%83%8b%e3%83%b3%e3%82%b0%ef%bc%88%e3%83%a1%e3%83%a2%ef%bc%89","status":"publish","type":"post","link":"http:\/\/www.moonmile.net\/blog\/archives\/2225","title":{"rendered":"SELECT \u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u30c1\u30e5\u30fc\u30cb\u30f3\u30b0\uff08\u30e1\u30e2\uff09"},"content":{"rendered":"

SELECT \u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u30c1\u30e5\u30fc\u30cb\u30f3\u30b0\uff08\u30e1\u30e2\uff09<\/p>\n

\u3061\u3087\u3063\u3068\u3001\u30e1\u30e2\u7684\u306b\u66f8\u304d\u4e0b\u3057\u3066\u304a\u304d\u307e\u3059\u3002<\/p>\n

1. 10 \u500b\u306e\u30c6\u30fc\u30d6\u30eb\u306b 20000 \u4ef6\u305a\u3064\u30c7\u30fc\u30bf\u3092\u5165\u308c\u3066\u304a\u304d\u307e\u3059\u3002
\n2. 10 \u500b\u306e\u30c6\u30fc\u30d6\u30eb\u306b\u5bfe\u3057\u3066\u30012000 \u56de\u305a\u3064\u691c\u7d22\u3057\u307e\u3059\u3002<\/p>\n

\u3068\u3044\u3046\u30d1\u30bf\u30fc\u30f3\u304c\u3042\u3063\u305f\u3068\u304d\u3001\u3069\u3046\u3084\u308b\u3068\u65e9\u3044\u3067\u3057\u3087\u3046\u304b\uff1f\u3068\u3044\u3046\u554f\u984c\u3002<\/p>\n

\u25a01\u56de\u305a\u3064 SqlDataAdapter \u3092\u547c\u3073\u51fa\u3059<\/p>\n

\u3060\u3044\u305f\u3044 200 \u79d2\u3050\u3089\u3044\u304b\u304b\u308a\u307e\u3059\u3002<\/p>\n

\r\n\/\/\/ <summary>\r\n\/\/\/ \u500b\u5225SELECT\r\n\/\/\/ <\/summary>\r\n\/\/\/ <param name=&quot;sender&quot;><\/param>\r\n\/\/\/ <param name=&quot;e&quot;><\/param>\r\nprivate void button3_Click(object sender, EventArgs e)\r\n{\r\n    \/\/ \u5f8b\u5100\u306bSELECT\u6587\u309210\u56de\u767a\u884c\u3057\u307e\u3059\u3002\r\n    DateTime start = DateTime.Now;\r\n    string s = toMD5(start.ToString());\r\n    int count = 0;\r\n    SqlConnection cn = new SqlConnection(CNSTR);\r\n    int max = 2000;\r\n    for (int i = 0; i < max; i++)\r\n    {\r\n        for ( int j=0; j<10; j++ ) {\r\n            DataTable dt = new DataTable();\r\n            SqlDataAdapter da = new SqlDataAdapter(\r\n                string.Format(&quot;SELECT * FROM table{0} WHERE col0 = '{1}'&quot;, j, s), cn);\r\n            s = toMD5(s);\r\n            da.Fill( dt );\r\n        }\r\n        if (++count % 10 == 0)\r\n            toStatus(count, max);\r\n    }\r\n    DateTime end = DateTime.Now;\r\n    textBox2.Text = ((TimeSpan)(end - start)).TotalSeconds.ToString(&quot;#.0&quot;);\r\n}\r\n<\/pre>\n
\u25a010\u56de\u306e\u547c\u3073\u51fa\u3057\u3092\u3072\u3068\u3064\u306b\u307e\u3068\u3081\u308b<\/p>\n
SQL Server \u306e\u5834\u5408\u3001\u8907\u6570\u306e\u691c\u7d22\u7d50\u679c\u3092\u53d6\u308c\u308b\u306e\u3067 DataSet \u3092\u4f7f\u3063\u3066 1 \u56de\u306b\u307e\u3068\u3081\u307e\u3059\u3002
\nSQL Server 2008 \u3060\u3068 10 \u500d\u3050\u3089\u3044\u65e9\u304f\u306a\u3063\u3066 15 \u79d2\u7a0b\u5ea6\u306a\u3093\u3067\u3059\u304c\u3001
\nSQL Server 2000 \u3060\u3068\u3001\u6700\u521d\u306e\u30d1\u30bf\u30fc\u30f3\u3088\u308a\u3082\u9045\u304f\u306a\u3063\u3066\u3057\u307e\u3046\u3093\u3067\u3059\u3088\u306d…\u4f55\u6545\u3060\u308d\u3046\uff1f<\/p>\n
\r\n\/\/\/ <summary>\r\n\/\/\/ \u307e\u3068\u3081\u3066SELECT\r\n\/\/\/ <\/summary>\r\n\/\/\/ <param name=&quot;sender&quot;><\/param>\r\n\/\/\/ <param name=&quot;e&quot;><\/param>\r\n\/\/\/ <remarks>\r\n\/\/\/ \u9045\u304f\u3066\u305c\u3093\u305c\u3093\u3060\u3081\r\n\/\/\/ SQL Server 2008 \u3060\u3068 ok \u306a\u306e\u3060\u304c\u3001SQL Server 2000 \u3060\u3068\u99c4\u76ee\u3089\u3057\u3044\u3002\r\n\/\/\/ <\/remarks>\r\nprivate void button4_Click(object sender, EventArgs e)\r\n{\r\n    \/\/ 10\u56de\u306eSELECT\u3092\u3072\u3068\u307e\u3068\u3081\u306b\u3057\u3066 DataSet \u306b\u4fdd\u5b58\u3057\u307e\u3059\u3002\r\n    DateTime start = DateTime.Now;\r\n    string s = toMD5(start.ToString());\r\n    int count = 0;\r\n    SqlConnection cn = new SqlConnection(CNSTR);\r\n    string sql = &quot;&quot;;\r\n    int max = 2000;\r\n    for (int i = 0; i < max; i++)\r\n    {\r\n        for (int j = 0; j < 10; j++)\r\n        {\r\n            sql += string.Format(&quot;SELECT * FROM table{0} WHERE col0 = '{1}' &quot;, j, s);\r\n            s = toMD5(s);\r\n        }\r\n        DataSet ds = new DataSet();\r\n        SqlDataAdapter da = new SqlDataAdapter(sql, cn);\r\n        da.Fill(ds);\r\n        if (++count % 10 == 0)\r\n            toStatus(count, max );\r\n    }\r\n    DateTime end = DateTime.Now;\r\n    textBox2.Text = ((TimeSpan)(end - start)).TotalSeconds.ToString(&quot;#.0&quot;);\r\n}\r\n<\/pre>\n
\u25a0\u3042\u3089\u304b\u3058\u3081 SqlCommand \u3092\u4f5c\u6210\u3059\u308b<\/p>\n
prepared sql statement \u3068\u3044\u3046\u3053\u3068\u3067\u3001\u3042\u3089\u304b\u3058\u3081 SqlCommand \u3067\u4f5c\u6210\u3057\u3066\u304a\u304d\u307e\u3059\u3002
\n\u3053\u308c\u3092\u3084\u308b\u3068\u300112,3 \u79d2\u306b\u306a\u308a\u307e\u3059\u3002
\n\u30eb\u30fc\u30d7\u306e\u4e2d\u3067 SqlCommand \u3092\u4f5c\u308b\u3068\u65e9\u304f\u306a\u3089\u306a\u3044\u306e\u3067\u6ce8\u610f\u304c\u5fc5\u8981\u3067\u3059\u306d\u3002<\/p>\n
\r\n\/\/\/ <summary>\r\n\/\/\/ SqlCommand \u306e\u5229\u7528\r\n\/\/\/ <\/summary>\r\n\/\/\/ <param name=&quot;sender&quot;><\/param>\r\n\/\/\/ <param name=&quot;e&quot;><\/param>\r\nprivate void button5_Click(object sender, EventArgs e)\r\n{\r\n    \/\/ 10\u56de\u306eSELECT\u3092\u3072\u3068\u307e\u3068\u3081\u306b\u3057\u3066 DataSet \u306b\u4fdd\u5b58\u3057\u307e\u3059\u3002\r\n    DateTime start = DateTime.Now;\r\n    string s = toMD5(start.ToString());\r\n    int count = 0;\r\n    SqlConnection cn = new SqlConnection(CNSTR);\r\n    string sql = &quot;&quot;;\r\n\r\n    SqlCommand cmd = new SqlCommand(&quot;&quot;,cn);\r\n    for (int j = 0; j < 10; j++)\r\n    {\r\n        sql += string.Format(&quot;SELECT * FROM table{0} WHERE col0 = @param{1} &quot;, j, j);\r\n        s = toMD5(s);\r\n        cmd.Parameters.Add(new SqlParameter(\r\n            string.Format(&quot;@param{0}&quot;, j), SqlDbType.VarChar, 50));\r\n    }\r\n    cmd.CommandText = sql;\r\n\r\n    int max = 2000;\r\n    for (int i = 0; i < max; i++)\r\n    {\r\n        for (int j = 0; j < 10; j++)\r\n        {\r\n            cmd.Parameters[j].Value = s;\r\n            s = toMD5(s);\r\n        }\r\n        DataSet ds = new DataSet();\r\n        SqlDataAdapter da = new SqlDataAdapter(cmd);\r\n        da.Fill(ds);\r\n        if (++count % 10 == 0)\r\n            toStatus(count, max);\r\n    }\r\n    DateTime end = DateTime.Now;\r\n    textBox2.Text = ((TimeSpan)(end - start)).TotalSeconds.ToString(&quot;#.0&quot;);\r\n}\r\n<\/pre>\n
\u66f4\u306b\u9ad8\u901f\u5316\u3059\u308b\u5834\u5408\u306f\u3069\u3046\u3059\u308b\u3093\u3067\u3057\u3087\u3046\u306d\uff1f
\n .NET \u306e\u6587\u3060\u3051\u304a\u305d\u304f\u306a\u308b\u304b\u3089\u3001C++ \u3067\u66f8\u304d\u76f4\u3059\u3068\u65e9\u304f\u306a\u308b\u306e\u304b\u306a\uff1f<\/p>\n","protected":false},"excerpt":{"rendered":"
SELECT \u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u30c1\u30e5\u30fc\u30cb\u30f3\u30b0\uff08\u30e1\u30e2\uff09 \u3061\u3087\u3063\u3068\u3001\u30e1\u30e2\u7684\u306b\u66f8\u304d\u4e0b\u3057\u3066\u304a\u304d\u307e\u3059\u3002 1. 10 \u500b\u306e\u30c6\u30fc\u30d6\u30eb\u306b 20000 \u4ef6\u305a\u3064\u30c7\u30fc\u30bf\u3092\u5165\u308c\u3066\u304a\u304d\u307e\u3059\u3002 2. 10 \u500b\u306e\u30c6\u30fc\u30d6\u30eb\u306b\u5bfe\u3057\u3066\u30012000 \u56de\u305a\u3064\u691c\u7d22\u3057 … \u7d9a\u304d\u3092\u8aad\u3080 →<\/span><\/a><\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[3,23],"tags":[],"class_list":["post-2225","post","type-post","status-publish","format-standard","hentry","category-dev","category-csharp"],"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"http:\/\/www.moonmile.net\/blog\/wp-json\/wp\/v2\/posts\/2225","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/www.moonmile.net\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/www.moonmile.net\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/www.moonmile.net\/blog\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"http:\/\/www.moonmile.net\/blog\/wp-json\/wp\/v2\/comments?post=2225"}],"version-history":[{"count":1,"href":"http:\/\/www.moonmile.net\/blog\/wp-json\/wp\/v2\/posts\/2225\/revisions"}],"predecessor-version":[{"id":2226,"href":"http:\/\/www.moonmile.net\/blog\/wp-json\/wp\/v2\/posts\/2225\/revisions\/2226"}],"wp:attachment":[{"href":"http:\/\/www.moonmile.net\/blog\/wp-json\/wp\/v2\/media?parent=2225"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.moonmile.net\/blog\/wp-json\/wp\/v2\/categories?post=2225"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.moonmile.net\/blog\/wp-json\/wp\/v2\/tags?post=2225"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}