{"id":150,"date":"2019-09-11T23:23:44","date_gmt":"2019-09-11T15:23:44","guid":{"rendered":"http:\/\/www.cgh0610.cn\/?p=150"},"modified":"2019-09-11T23:23:44","modified_gmt":"2019-09-11T15:23:44","slug":"mysql%e7%9a%84-found_rows-%e5%87%bd%e6%95%b0%e5%92%8c-row_count-%e5%87%bd%e6%95%b0","status":"publish","type":"post","link":"https:\/\/www.cgh0610.cn\/?p=150","title":{"rendered":"MySQL\u7684 FOUND_ROWS() \u51fd\u6570\u548c ROW_COUNT() \u51fd\u6570"},"content":{"rendered":"<p>1.\u5148\u586b\u4e2a\u5751<br \/>\n\u5982\u679c\u4f60\u8981\u6d4b\u8bd5 FOUND_ROWS() \u548c ROW_COUNT()\u00a0\u8fd9\u4e24\u4e2a\u51fd\u6570\uff0c\u6700\u597d\u5c31\u4e0d\u8981\u7528\u90a3\u4e9bMySQL\u7684\u56fe\u5f62\u5316\u7ba1\u7406\u5de5\u5177\u8f6f\u4ef6\u4e86\uff08\u4f8b\u5982\uff0cSQLYog\uff09\u3002\u56e0\u4e3a\u5f53\u4f60\u4f7f\u7528\u4e9b\u5de5\u5177\u8f6f\u4ef6\u6267\u884c\u67d0\u6761SQL\u8bed\u53e5\u65f6\uff0c\u53ef\u80fd\u5b9e\u9645\u4e0a\u5e76\u4e0d\u4ec5\u4ec5\u662f\u6267\u884c\u4e86\u8fd9\u6761SQL\uff0c\u8fd9\u4e9b\u8f6f\u4ef6\u540c\u65f6\u4f1a\u5728\u540e\u53f0\u81ea\u5df1\u6267\u884c\u4e00\u4e9b\u5176\u4ed6SQL\u8bed\u53e5\u3002\u6240\u4ee5\u6709\u65f6\u4f60\u53ef\u80fd\u4f1a\u53d1\u73b0\u8fd9\u4e24\u4e2a\u51fd\u6570\u8fd4\u56de\u7684\u7ed3\u679c\u548c\u4f60\u9884\u671f\u7684\u5e76\u4e0d\u4e00\u6837\u3002\u6240\u4ee5\u5462\uff0c\u6700\u597d\u8fd8\u662f\u7528 cmd \u7a97\u53e3\u6765\u6267\u884cSQL\u8fdb\u884c\u6d4b\u8bd5\u3002<\/p>\n<p>2.FOUND_ROWS() \u51fd\u6570<br \/>\n\uff081\uff09 FOUND_ROWS()\u51fd\u6570\u8fd4\u56de\u7684\u662f\u4e0a\u4e00\u6761 SELECT \u8bed\u53e5\uff08\u6216 SHOW\u8bed\u53e5\u7b49\uff09\u67e5\u8be2\u7ed3\u679c\u96c6\u7684\u8bb0\u5f55\u6570\u3002<\/p>\n<p>\u6ce8\u610f\uff0c\u662f\u4e0a\u4e00\u6761 SELECT \u8bed\u53e5\uff08\u5373\u6267\u884c\u8be5\u51fd\u6570\u524d\u7684\u6700\u8fd1\u4e00\u6761SELECT\u8bed\u53e5\uff09\uff0c\u800c\u4e0d\u662f\u4e0a\u4e00\u6761 SQL \u8bed\u53e5\uff1b\u56e0\u4e3a\u4e0a\u4e00\u6761SQL\u8bed\u53e5\u4e0d\u4e00\u5b9a\u662f SELECT \u8bed\u53e5\u3002<\/p>\n<p>\u4e14\uff0c\u50cf SELECT ROW_COUNT() \u8fd9\u79cd\u8bed\u53e5\u4e5f\u662f SELECT \u8bed\u53e5\uff0c\u5b83\u4eec\u7684\u7ed3\u679c\u96c6\u4e5f\u4f1a\u88ab FOUND_ROWS() \u51fd\u6570\u67e5\u51fa\u6765\u3002<\/p>\n<p>\uff082\uff09\u5982\u679c\u4e0a\u4e00\u6761 SELECT \u8bed\u53e5\u67e5\u8be2\u7ed3\u679c\u4e3a\u7a7a\uff0c\u5219\u8fd4\u56de\u00a00\u3002<\/p>\n<p>\uff083\uff09SHOW XXX\uff08\u4f8b\u5982\uff0cshow tables\u3001show databases\u3001show status\uff09\u8bed\u53e5\u4e5f\u4f1a\u88ab FOUND_ROWS() \u51fd\u6570\u67e5\u51fa\u6765\u3002<\/p>\n<ol start=\"3\">\n<li>ROW_COUNT() \u51fd\u6570<br \/>\n\uff081\uff09FOUND_ROWS()\u51fd\u6570\u8fd4\u56de\u7684\u662f\u4e0a\u4e00\u6761SQL\u8bed\u53e5\uff0c\u5bf9\u8868\u6570\u636e\u8fdb\u884c\u4fee\u6539\u64cd\u4f5c\u540e\u5f71\u54cd\u7684\u8bb0\u5f55\u6570\u3002<\/li>\n<\/ol>\n<p>\u5982\u679c\u4e0a\u4e00\u6761SQL\u8bed\u53e5\u4e0d\u662f\u4fee\u6539\u64cd\u4f5c\u8bed\u53e5\uff08INSERT\/UPDATE\/DELETE \u7b49\uff09\uff0c\u800c\u662f\u67e5\u8be2\u8bed\u53e5\uff08SELECT\/SHOW \u7b49\uff09\u5219\u8fd4\u56de-1\u3002\u5982\u679c\u662f\u4fee\u6539\u64cd\u4f5c\u8bed\u53e5\uff0c\u5219\u8fd4\u56de\u4fee\u6539\uff08\u589e\/\u5220\/\u8be5\uff09\u5f71\u54cd\u7684\u8bb0\u5f55\u6570\u3002<\/p>\n<p>\u6ce8\u610f\uff0c\u8fd9\u91cc\u662f\u4e0a\u4e00\u6761SQL\u8bed\u53e5\uff08\u5373\u6267\u884c\u8be5\u51fd\u6570\u524d\u7684\u4e0a\u4e00\u6761SQL\u8bed\u53e5\uff09\uff0c\u548c\u4e0a\u9762\u6709\u6240\u533a\u522b\u3002<\/p>\n<p>\uff082\uff09\u5982\u679c\u4e0a\u4e00\u6761SQL\u8bed\u53e5\u662fUPDATE\u8bed\u53e5\uff0c\u4f46\u662fUPDATE\u540e\u6240\u6709\u6570\u636e\u7684\u503c\u5e76\u6ca1\u6709\u6539\u53d8\uff0c\u5219\u8fd4\u56de 0\u3002<\/p>\n<p>\uff083\uff09\u5982\u679c\u4e0a\u4e00\u6761SQL\u8bed\u53e5\u662f\u5efa\u8868\u8bed\u53e5\uff08\u521b\u5efa\u8868\u6216\u4e34\u65f6\u8868\uff09\uff0c\u4f46\u521b\u5efa\u7684\u662f\u7a7a\u8868\uff0c\u5219\u8fd4\u56de 0\u3002<\/p>\n<p>\u5982\u679c\u662f\u5220\u9664\u8868\uff08DROP\u8bed\u53e5\uff09\uff0c\u5219\u8fd4\u56de\u7684\u8fd8\u662f 0\u3002<\/p>\n<p>\uff084\uff09\u5982\u679c\u662f\u521b\u5efa\u4e34\u65f6\u8868\uff0c\u4f46\u4f7f\u7528\u7684\u662f AS \u5173\u952e\u5b57\u76f4\u63a5\u5c06\u67e5\u8be2\u51fa\u6765\u7684\u503c\u8d4b\u503c\u7ed9\u65b0\u5efa\u7684\u4e34\u65f6\u8868\u7684\u8bdd\uff08\u5176\u5b9e\u5c31\u76f8\u5f53\u4e8e\u65b0\u5efa\u4e86\u4e00\u4e2a\u7a7a\u8868\uff0c\u7d27\u63a5\u7740\u4f7f\u7528\u4e86\u4e00\u6761INSERT\u8bed\u53e5\u800c\u5df2\uff09\uff0c\u5219\u8fd4\u56de\u63d2\u5165\u7684\u8bb0\u5f55\u6570\u3002<\/p>\n<pre><code class=\"language-sql line-numbers\">CREATE TEMPORARY TABLE tmp_sal AS\nSELECT \n    *\nFROM \n    employee \nWHERE \n    salary &lt; 12000;\n<\/code><\/pre>\n<p>\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014<\/p>\n<p>\u539f\u6587\u94fe\u63a5\uff1ahttps:\/\/blog.csdn.net\/zhou520yue520\/article\/details\/81155248<\/p>\n","protected":false},"excerpt":{"rendered":"<p>1.\u5148\u586b\u4e2a\u5751 \u5982\u679c\u4f60\u8981\u6d4b\u8bd5 FOUND_ROWS() \u548c ROW_COUNT()\u00a0\u8fd9\u4e24\u4e2a\u51fd\u6570\uff0c\u6700\u597d\u5c31\u4e0d\u8981\u7528\u90a3\u4e9b &hellip; <a href=\"https:\/\/www.cgh0610.cn\/?p=150\" class=\"more-link\">\u7ee7\u7eed\u9605\u8bfb<span class=\"screen-reader-text\">MySQL\u7684 FOUND_ROWS() \u51fd\u6570\u548c ROW_COUNT() \u51fd\u6570<\/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":[],"_links":{"self":[{"href":"https:\/\/www.cgh0610.cn\/index.php?rest_route=\/wp\/v2\/posts\/150"}],"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=150"}],"version-history":[{"count":1,"href":"https:\/\/www.cgh0610.cn\/index.php?rest_route=\/wp\/v2\/posts\/150\/revisions"}],"predecessor-version":[{"id":151,"href":"https:\/\/www.cgh0610.cn\/index.php?rest_route=\/wp\/v2\/posts\/150\/revisions\/151"}],"wp:attachment":[{"href":"https:\/\/www.cgh0610.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=150"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.cgh0610.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=150"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.cgh0610.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=150"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}