{"id":2076,"date":"2015-06-24T21:26:13","date_gmt":"2015-06-24T19:26:13","guid":{"rendered":"http:\/\/soci.hu\/blog\/?p=2076"},"modified":"2015-06-24T21:26:13","modified_gmt":"2015-06-24T19:26:13","slug":"2-karakter-es-maris-mas-az-execution-plan","status":"publish","type":"post","link":"https:\/\/soci.hu\/blog\/index.php\/2015\/06\/24\/2-karakter-es-maris-mas-az-execution-plan\/","title":{"rendered":"2 karakter, \u00e9s m\u00e1ris m\u00e1s az execution plan"},"content":{"rendered":"<p>Az eredeti lek\u00e9rdez\u00e9sben az ORDER BY \u00edgy n\u00e9zett ki: order by BDT.<br \/>\nEz a sz\u00e1m\u00edtott oszlopra vonatkozott, az\u00e9rt a szervernek meg kellett oldania a rendez\u00e9st egy k\u00fcl\u00f6n l\u00e9p\u00e9sben. A b.BDT ut\u00e1n viszont m\u00e1r tudja haszn\u00e1lni az alatta lev\u0151 index rendezetts\u00e9g\u00e9t, \u00edgy nem kell rendeznie. 4x teljes\u00edtm\u00e9nyn\u00f6veked\u00e9st okozott ez a 2 karakter.<\/p>\n<pre class=\"brush: sql; title: ; notranslate\" title=\"\">\r\nselect\r\ndateadd(second, @dtModifier, BDT) BDT,\r\ncast(O as real) O, \r\ncast(H as real) H, \r\ncast(L as real) L,\r\ncast(C as real) C,\r\nV\r\nfrom dbo.Bar b with (nolock)\r\nwhere b.TickerID = @TickerID\r\nand b.BDT &gt;= @StartDate\r\nand I = @I\r\norder by b.BDT\r\n<\/pre>\n","protected":false},"excerpt":{"rendered":"<p>Az eredeti lek\u00e9rdez\u00e9sben az ORDER BY \u00edgy n\u00e9zett ki: order by BDT. Ez a sz\u00e1m\u00edtott oszlopra vonatkozott, az\u00e9rt a szervernek meg kellett&#8230;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[6,4,30,21,58,77,78,87,95],"tags":[],"class_list":["post-2076","post","type-post","status-publish","format-standard","hentry","category-adatbazisok","category-szakmai-elet","category-sql-server","category-sql-server-2005","category-sql-server-2008","category-sql-server-2008-r2","category-sql-server-2012","category-sql-server-2014","category-sql-server-2016"],"_links":{"self":[{"href":"https:\/\/soci.hu\/blog\/index.php\/wp-json\/wp\/v2\/posts\/2076","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/soci.hu\/blog\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/soci.hu\/blog\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/soci.hu\/blog\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/soci.hu\/blog\/index.php\/wp-json\/wp\/v2\/comments?post=2076"}],"version-history":[{"count":1,"href":"https:\/\/soci.hu\/blog\/index.php\/wp-json\/wp\/v2\/posts\/2076\/revisions"}],"predecessor-version":[{"id":2077,"href":"https:\/\/soci.hu\/blog\/index.php\/wp-json\/wp\/v2\/posts\/2076\/revisions\/2077"}],"wp:attachment":[{"href":"https:\/\/soci.hu\/blog\/index.php\/wp-json\/wp\/v2\/media?parent=2076"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/soci.hu\/blog\/index.php\/wp-json\/wp\/v2\/categories?post=2076"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/soci.hu\/blog\/index.php\/wp-json\/wp\/v2\/tags?post=2076"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}