{"id":108,"date":"2019-07-10T10:32:23","date_gmt":"2019-07-10T02:32:23","guid":{"rendered":"http:\/\/www.cgh0610.cn\/?p=108"},"modified":"2019-07-10T10:32:23","modified_gmt":"2019-07-10T02:32:23","slug":"mysql%e5%ad%97%e7%ac%a6%e4%b8%b2%e6%8b%bc%e6%8e%a5%e6%96%b9%e6%b3%95","status":"publish","type":"post","link":"https:\/\/www.cgh0610.cn\/?p=108","title":{"rendered":"Mysql\u5b57\u7b26\u4e32\u62fc\u63a5\u65b9\u6cd5"},"content":{"rendered":"<p>Mysql\u4e2d\u5b57\u7b26\u4e32\u8fde\u63a5<\/p>\n<pre><code class=\"language-php line-numbers\">SELECT '12'+'32','1abc'+'22','abc'+'3'\n#\u7ed3\u679c\u4e3a\uff1a44,2,3\n#\u5e76\u975e\u6211\u4eec\u60f3\u8981\u76841232,1abc22,abc3\n#\u6ce8\uff1a\u5728Mysql\u4e2d\uff0c\u4f7f\u7528\u201c+\u201d\u8fdb\u884c\u5b57\u7b26\u8fde\u63a5\u65f6\uff0cmysql\u4f1a\u5c1d\u8bd5\u5c06\u5b57\u6bb5\u503c\u8f6c\u6362\u4e3a\u6570\u5b57\u7c7b\u578b\uff08\u5982\u679c\u8f6c\u6362\u5931\u8d25\uff0c\u5c31\u5f53\u505a\u6570\u5b570\u5904\u7406\uff09\u3002\u5982\u20191abc\u2019+\u201922\u2032\uff0cmysql\u5c06\u201c1abc\u201d\u8f6c\u6210\u6570\u5b571\u5728\u8fdb\u884c\u8fd0\u7b97\uff1b\u5c06\u201cabc\u201d\u5f53\u505a0\u5904\u7406\u3002\n<\/code><\/pre>\n<p>\u6240\u4ee5\u5728Mysql\u4e2d\u8981\u4f7f\u7528\u51fd\u6570CONCAT(str1,str2,&#8230;)\u6765\u8fdb\u884c\u5b57\u7b26\u4e32\u62fc\u63a5\uff0cCONCAT\u51fd\u6570\u652f\u6301\u4e00\u4e2a\u6216\u8005\u591a\u4e2a\u53c2\u6570\uff0c\u53c2\u6570\u7c7b\u578b\u53ef\u4ee5\u4e3a\u5b57\u7b26\u4e32\u7c7b\u578b\u4e5f\u53ef\u4ee5\u662f\u975e\u5b57\u7b26\u4e32\u7c7b\u578b\uff0c\u5bf9\u4e8e\u975e\u5b57\u7b26\u4e32\u7c7b\u578b\u7684\u53c2\u6570MYSQL\u5c06\u5c1d\u8bd5\u5c06\u5176\u8f6c\u5316\u4e3a\u5b57\u7b26\u4e32\u7c7b\u578b\uff0cCONCAT\u51fd\u6570\u4f1a\u5c06\u6240\u6709\u53c2\u6570\u6309\u7167\u53c2\u6570\u7684\u987a\u5e8f\u62fc\u63a5\u6210\u4e00\u4e2a\u5b57\u7b26\u4e32\u505a\u4e3a\u8fd4\u56de\u503c\u3002<\/p>\n<pre><code class=\"language-php line-numbers\">SELECT CONCAT('\u8f66\u578b\uff1a',type,',\u989c\u8272:',color) FROM car;\n#\u7ed3\u679c\uff1a\u201c\u8f66\u578b\uff1a\u7d27\u51d1\uff0c\u989c\u8272\uff1a\u9a9a\u7c89\u201d\n<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"<p>Mysql\u4e2d\u5b57\u7b26\u4e32\u8fde\u63a5 SELECT &#8217;12&#8217;+&#8217;32&#8217;,&#8217;1abc&#8217;+&#8217;22&#8217;,&#8217;abc&#8217;+&#8217;3&#8242; #\u7ed3\u679c\u4e3a &hellip; <a href=\"https:\/\/www.cgh0610.cn\/?p=108\" class=\"more-link\">\u7ee7\u7eed\u9605\u8bfb<span class=\"screen-reader-text\">Mysql\u5b57\u7b26\u4e32\u62fc\u63a5\u65b9\u6cd5<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"aside","meta":[],"categories":[39,12],"tags":[47,28,46],"_links":{"self":[{"href":"https:\/\/www.cgh0610.cn\/index.php?rest_route=\/wp\/v2\/posts\/108"}],"collection":[{"href":"https:\/\/www.cgh0610.cn\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.cgh0610.cn\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.cgh0610.cn\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.cgh0610.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=108"}],"version-history":[{"count":2,"href":"https:\/\/www.cgh0610.cn\/index.php?rest_route=\/wp\/v2\/posts\/108\/revisions"}],"predecessor-version":[{"id":110,"href":"https:\/\/www.cgh0610.cn\/index.php?rest_route=\/wp\/v2\/posts\/108\/revisions\/110"}],"wp:attachment":[{"href":"https:\/\/www.cgh0610.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=108"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.cgh0610.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=108"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.cgh0610.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=108"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}