{"id":4245,"date":"2019-01-11T08:26:50","date_gmt":"2019-01-11T00:26:50","guid":{"rendered":"https:\/\/ixyzero.com\/blog\/?p=4245"},"modified":"2019-01-11T08:30:28","modified_gmt":"2019-01-11T00:30:28","slug":"hive-sql%e5%ad%a6%e4%b9%a0%e6%95%b4%e7%90%86","status":"publish","type":"post","link":"https:\/\/ixyzero.com\/blog\/archives\/4245.html","title":{"rendered":"Hive SQL\u5b66\u4e60\u6574\u7406"},"content":{"rendered":"<p>=Start=<\/p>\n<h4 id=\"id-\u6a21\u677f-\u7f18\u7531\uff1a\">\u7f18\u7531\uff1a<\/h4>\n<p>\u6700\u8fd1\u7528Hive SQL\u67e5\u6570\u636e\u6bd4\u8f83\u591a\uff0c\u867d\u7136HQL\u5927\u4f53\u4e0a\u548c\u5e38\u7528\u7684SQL\u6ca1\u4ec0\u4e48\u533a\u522b\uff0c\u4f46\u662f\u4e5f\u6709\u4e00\u4e9b\u7279\u522b\u7684\u5730\u65b9\u9700\u8981\u6ce8\u610f\uff0c\u5728\u6b64\u6574\u7406\u4e00\u4e0b\uff0c\u65b9\u4fbf\u8981\u7528\u7684\u65f6\u5019\u53c2\u8003\u3002<\/p>\n<h4 id=\"id-\u6a21\u677f-\u6b63\u6587\uff1a\">\u6b63\u6587\uff1a<\/h4>\n<h5 id=\"id-\u6a21\u677f-\u53c2\u8003\u89e3\u7b54\uff1a\">\u53c2\u8003\u89e3\u7b54\uff1a<\/h5>\n<h6><span style=\"color: #ff0000;\">1\u3001\u4e0d\u7b49\u4e8e<\/span><\/h6>\n<pre class=\"lang:default decode:true \">\u8bf7\u4f7f\u7528 &lt;&gt; \u800c\u4e0d\u8981\u7528 !=<\/pre>\n<h6>2\u3001\u5bf9\u4e8eNULL\u5217\u7684\u5904\u7406<\/h6>\n<pre class=\"lang:default decode:true \">column1 is not NULL AND column1 &lt;&gt; '' AND length(column1) &gt; 0<\/pre>\n<h6><span style=\"color: #ff0000;\">3\u3001\u4e24\u8868\u8054\u5408\u67e5\u8be2<\/span><\/h6>\n<pre class=\"lang:default decode:true \">-- \u5728MySQL\u4e2d\u5c06\u5173\u8054\u6761\u4ef6\u653e\u5728 where \u4e2d\r\nSELECT pet.name, comment FROM pet, event WHERE pet.name = event.name;\r\n\r\n-- \u5728Hive SQL\u4e2d\u5c06\u5173\u8054\u6761\u4ef6\u653e\u5728 on \u4e2d\r\nSELECT pet.name, comment FROM pet JOIN event ON (pet.name = event.name);\r\n<\/pre>\n<h6><span style=\"color: #ff0000;\">4\u3001\u591a\u8868\u8054\u5408\u67e5\u8be2<\/span><\/h6>\n<pre class=\"lang:default decode:true\">-- \u4e24\u8868\u5355\u6761\u4ef6\r\nSELECT a.* FROM a JOIN b ON (a.id = b.id)\r\n-- \u4e24\u8868\u591a\u6761\u4ef6\r\nSELECT a.* FROM a JOIN b ON (a.id = b.id AND a.department = b.department)\r\n\r\n--\u591a\u8868\u8054\u5408join\r\nSELECT a.val, b.val, c.val\r\nFROM\r\na\r\nJOIN\r\nb ON (a.key = b.key1)\r\nJOIN\r\nc ON (c.key = b.key2)\r\n<\/pre>\n<h6><span style=\"color: #ff0000;\">5\u3001\u6a21\u7cca\u5339\u914d<\/span><\/h6>\n<pre class=\"lang:default decode:true \">like\u7528\u4e8e\u6307\u5b9a\u7279\u5b9a\u7684\u5b57\u7b26\u4e32\u505a\u6a21\u7cca\u5339\u914d\uff08\u7528 % \u6307\u4ee3\u4efb\u610f\u4e2a\u6570\u7684\u4efb\u610f\u5b57\u7b26\uff0c\u7528 _ \u6307\u4ee3\u4e00\u4e2a\u4efb\u610f\u5b57\u7b26\uff09\r\nselect uid from dw.today where tunittype like '%wew.%'\r\n\r\nrlike\u662fHive\u4e2d\u5bf9like\u7684\u6269\u5c55\uff0c\u53ef\u4ee5\u5c06\u539f\u5148\u591a\u4e2alike\u624d\u80fd\u5b8c\u6210\u7684\u4efb\u52a1\uff0c\u4f7f\u7528\u4e00\u4e2arlike\u5c31\u53ef\u4ee5\u641e\u5b9a\r\nselect uid from dw.today where tunittype rlike '.*(you|me).*'\r\n\r\n\u70b9\u53f7(.)\uff1a\u8868\u793a\u548c\u4efb\u610f\u5b57\u7b26\u5339\u914d\uff1b\u661f\u53f7(*)\uff1a\u8868\u793a\u91cd\u590d\u201c\u5de6\u8fb9\u7684\u5b57\u7b26\u4e32\u201d\uff1b\uff08x|y\uff09\u8868\u793a\u548cx\u6216\u8005y\u5339\u914d\r\n\r\n\u5bf9like\u53d6\u53cd\r\n\u4e00\u822c\uff0clike\u7684\u8bed\u6cd5\u5f62\u5f0f\u662f\uff1a A LIKE B\uff0c\u53d6\u53cd\u7684\u8bed\u6cd5\u5f62\u5f0f\uff1aNOT A LIKE B\r\nselect uid from dw.today where not tunittype like '%wew.%'<\/pre>\n<h6>6\u3001\u5f53\u524d\u65f6\u95f4&amp;\u5c06\u79d2\u683c\u5f0f\u7684\u65f6\u95f4\u6233\u6309\u7279\u5b9a\u683c\u5f0f\u5c55\u793a<\/h6>\n<pre class=\"lang:default decode:true \">SELECT from_unixtime(unix_timestamp())<\/pre>\n<h6><span style=\"color: #ff0000;\">7\u3001\u5c06\u6beb\u79d2\u683c\u5f0f\u7684\u65f6\u95f4\u6233\u8f6c\u6362\u6210\u53ef\u8bfb\u7684\u65e5\u671f\u683c\u5f0f<\/span><\/h6>\n<pre class=\"lang:default decode:true \" title=\"\u5148\u7528cast\u8fdb\u884c\u7c7b\u578b\u8f6c\u6362\">select from_unixtime(1543908748678,'yyyyMMdd');\t# 508940709\r\nselect from_unixtime(1543908748.678,'yyyyMMdd') # FAILED: SemanticException [Error 10014]: Line 1:7 Wrong arguments ''yyyyMMdd'': No matching method for class org.apache.hadoop.hive.ql.udf.UDFFromUnixTime with (double, string). Possible choices: _FUNC_(bigint)  _FUNC_(bigint, string)  _FUNC_(int)  _FUNC_(int, string)\r\nselect from_unixtime(1543908748,'yyyyMMdd') # 20181204\r\n\r\nselect 1543908748678, from_unixtime(CAST(1543908748678\/1000 as BIGINT), 'yyyy-MM-dd'); # 1543908748678\t2018-12-04\r\n\r\nfrom_unixtime(CAST(1543908748678\/1000 as BIGINT), 'yyyy-MM-dd_HH:mm:ss') # 1543908748678\t2018-12-04_15:32:28\r\n\r\n\/*\r\n$ date -r 1543908748\r\n2018\u5e7412\u6708 4\u65e5 \u661f\u671f\u4e8c 15\u65f632\u520628\u79d2 CST\r\n*\/\r\n<\/pre>\n<h6>8\u3001\u5982\u4f55\u68c0\u67e5\u9017\u53f7\u5206\u9694\u7684\u5b57\u7b26\u4e32\u4e2d\u662f\u5426\u5305\u542b\u67d0\u4e2a\u5b57\u7b26\u4e32\uff1f<\/h6>\n<pre class=\"lang:default decode:true \">list_ids = \"abc,cde,efg\";\r\nselect * from table_name where array_contains(split(list_ids,','), 'cde');<\/pre>\n<h6>9\u3001\u5982\u4f55\u5224\u65ad\u67d0\u4e2a\u5143\u7d20\u662f\u5426\u5728\u4e00\u4e2aarray\u4e2d\uff1f<\/h6>\n<pre class=\"lang:default decode:true \">\u65b9\u6cd5\u4e00\uff1a\r\narray_contains(Array&lt;T&gt;, value)\r\n\r\n\u65b9\u6cd5\u4e8c\uff1a\r\n\u5148 explode \u53d6\u51fa\u7279\u5b9a\u5217\u4e4b\u540e\uff0c\u518d\u8fdb\u884c\u5e38\u89c4\u7684\u5224\u7b49\u64cd\u4f5c\u3002<\/pre>\n<h6>10\u3001\u5b57\u7b26\u4e32\u8fde\u63a5\u51fd\u6570<\/h6>\n<pre class=\"lang:default decode:true \">-- \u5b57\u7b26\u4e32\u8fde\u63a5\u51fd\u6570\uff1aconcat\r\n-- \u8bed\u6cd5: concat(string A, string B...)\r\nhive&gt; select concat('www','.ixyzero','.com');\r\nwww.ixyzero.com\r\n\r\n-- \u5e26\u5206\u9694\u7b26\u5b57\u7b26\u4e32\u8fde\u63a5\u51fd\u6570\uff1aconcat_ws\r\n-- \u8bed\u6cd5: concat_ws(string SEP, string A, string B...)\r\nhive&gt; select concat_ws('.','www','ixyzero','com');\r\nwww.ixyzero.com<\/pre>\n<p>&nbsp;<\/p>\n<h5 id=\"id-\u6a21\u677f-\u53c2\u8003\u94fe\u63a5\uff1a\">\u53c2\u8003\u94fe\u63a5\uff1a<\/h5>\n<ul>\n<li><a href=\"https:\/\/www.yiibai.com\/hive\/\">Hive\u6559\u7a0b<\/a><\/li>\n<li><a href=\"https:\/\/blog.csdn.net\/strongyoung88\/article\/details\/53743937\">Hive \u6559\u7a0b\uff08\u5b98\u65b9Tutorial\uff09<\/a><br \/>\n<a href=\"https:\/\/cwiki.apache.org\/confluence\/display\/Hive\/Tutorial\">https:\/\/cwiki.apache.org\/confluence\/display\/Hive\/Tutorial<\/a><\/li>\n<li><a href=\"https:\/\/cwiki.apache.org\/confluence\/display\/Hive\/LanguageManual\">\u8bed\u8a00\u624b\u518c<\/a><\/li>\n<li><a href=\"https:\/\/blog.csdn.net\/xxzhangx\/article\/details\/81009738\">Hive SQL \u65e5\u5e38\u5de5\u4f5c\u4f7f\u7528\u603b\u7ed3<\/a>\u00a0#nice<\/li>\n<li><a href=\"https:\/\/www.iteblog.com\/archives\/1639.html\">Hive\u5e38\u7528\u5b57\u7b26\u4e32\u51fd\u6570<\/a>\u00a0#nice<\/li>\n<li><a href=\"http:\/\/hortonworks.com\/wp-content\/uploads\/2016\/05\/Hortonworks.CheatSheet.SQLtoHive.pdf\" target=\"_blank\" rel=\"noopener\">SQL\u548cHQL\u5e38\u89c1\u7528\u6cd5\u5bf9\u6bd4\u6e05\u5355<\/a>\u00a0#nice<\/li>\n<li><a href=\"https:\/\/stackoverflow.com\/questions\/14955125\/using-not-equal-symbol-in-hive-query\">Using not equal symbol in hive query<\/a><\/li>\n<\/ul>\n<p>=END=<\/p>\n","protected":false},"excerpt":{"rendered":"<p>=Start= \u7f18\u7531\uff1a \u6700\u8fd1\u7528Hive SQL\u67e5\u6570\u636e\u6bd4\u8f83\u591a\uff0c\u867d\u7136HQL\u5927\u4f53\u4e0a\u548c\u5e38\u7528\u7684SQL\u6ca1\u4ec0\u4e48\u533a\u522b\uff0c\u4f46\u662f\u4e5f\u6709 [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[14,7,12],"tags":[1261,421,1262],"class_list":["post-4245","post","type-post","status-publish","format-standard","hentry","category-database","category-programing","category-tools","tag-hive","tag-join","tag-sql"],"views":17704,"_links":{"self":[{"href":"https:\/\/ixyzero.com\/blog\/wp-json\/wp\/v2\/posts\/4245","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/ixyzero.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/ixyzero.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/ixyzero.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/ixyzero.com\/blog\/wp-json\/wp\/v2\/comments?post=4245"}],"version-history":[{"count":1,"href":"https:\/\/ixyzero.com\/blog\/wp-json\/wp\/v2\/posts\/4245\/revisions"}],"predecessor-version":[{"id":4246,"href":"https:\/\/ixyzero.com\/blog\/wp-json\/wp\/v2\/posts\/4245\/revisions\/4246"}],"wp:attachment":[{"href":"https:\/\/ixyzero.com\/blog\/wp-json\/wp\/v2\/media?parent=4245"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ixyzero.com\/blog\/wp-json\/wp\/v2\/categories?post=4245"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ixyzero.com\/blog\/wp-json\/wp\/v2\/tags?post=4245"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}