{"id":381,"date":"2026-08-06T11:13:28","date_gmt":"2026-08-06T03:13:28","guid":{"rendered":"https:\/\/www.erwa.cn\/?p=381"},"modified":"2026-08-06T11:15:31","modified_gmt":"2026-08-06T03:15:31","slug":"aoi%e4%b8%8a%e4%bc%a0%e6%bc%8f%e6%95%b0%e6%8d%ae-sql-server","status":"publish","type":"post","link":"https:\/\/www.erwa.cn\/index.php\/2026\/08\/06\/aoi%e4%b8%8a%e4%bc%a0%e6%bc%8f%e6%95%b0%e6%8d%ae-sql-server\/","title":{"rendered":"AOI\u4e0a\u4f20\u6f0f\u6570\u636e SQL server"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">select * from xx \uff08nolock\uff09 where testtime&gt;'2026-08-08 08:10:10.321' and testtime&lt;'2026-08-08 10:10:10.999' \u5728 2026-08-08 10:10:10.999 \u67e5\u8be2\u5904\u7406 50 \u884c\u6570\u636e\uff0c\u4f46\u662f\u540c\u6837\u7684 sql \u5728 2026-08-08 10:12:10.999 \u67e5\u8be2\u6709 51 \u884c\u3002 \u4ec0\u4e48\u60c5\u51b5\uff1f<\/p>\n\n\n\n<h1 class=\"wp-block-heading\">SQL Server \u65f6\u95f4\u8303\u56f4\u67e5\u8be2\uff0c\u8fc7 2 \u5206\u949f\u591a\u51fa\u6765 1 \u6761\u6570\u636e<\/h1>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p class=\"wp-block-paragraph\">SQL\uff1a<\/p>\n<\/blockquote>\n\n\n\n<p class=\"wp-block-paragraph\">sql<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>select * from xx with(nolock) \nwhere testtime&gt;'2026-08-08 08:10:10.321' \n  and testtime&lt;'2026-08-08 10:10:10.999'\n<\/code><\/pre>\n\n\n\n<ul class=\"wp-block-list\">\n<li>10:10:10.999 \u6267\u884c\uff1a\u8fd4\u56de 50 \u884c<\/li>\n\n\n\n<li>10:12:10.999\uff082 \u5206\u949f\u540e\uff09\u6267\u884c\uff1a\u8fd4\u56de 51 \u884c<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u6838\u5fc3\u73b0\u8c61\uff1a\u67e5\u8be2\u6761\u4ef6\u5b8c\u5168\u6ca1\u53d8\uff0c\u53ea\u662f\u73b0\u5b9e\u65f6\u95f4\u5f80\u540e\u8d70\u4e86 2 \u5206\u949f\uff0c\u7ed3\u679c\u884c\u6570 + 1\u3002\u6570\u636e\u5e93 SQL Server\u3002<\/strong><\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u6839\u56e0 1\uff1adatetime \u7cbe\u5ea6\u5751\uff08\u6700\u9ad8\u6982\u7387\uff09<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><code>datetime<\/code> \u7c7b\u578b<strong>\u7cbe\u5ea6\u662f 3.33 \u6beb\u79d2<\/strong>\uff0c\u4e0d\u662f 1 \u6beb\u79d2\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5b83\u53ea\u80fd\u53d6\uff1a<code>.000\u3001.003\u3001.007\u3001.010 \u2026\u2026<\/code><\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p class=\"wp-block-paragraph\"><code>999<\/code> \u6beb\u79d2\u7ed9 datetime\uff0c\u5185\u90e8\u4f1a\u81ea\u52a8\u820d\u5165\u5230 <code>10:10:11.000<\/code><\/p>\n<\/blockquote>\n\n\n\n<p class=\"wp-block-paragraph\">plaintext<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>'2026-08-08 10:10:10.999'  \u2192 datetime \u5b58\u50a8\u4f1a\u53d8\u6210 \u2192 2026-08-08 10:10:11.000\n<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u4f60\u7684\u6761\u4ef6\uff1a<code>testtime &lt; '2026-08-08 10:10:10.999'<\/code><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u7b49\u4ef7\u4e8e\uff1a<code>testtime &lt; 2026-08-08 10:10:11.000<\/code><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u90a3\u4e3a\u4ec0\u4e48<strong>\u540c\u4e00\u5957 SQL\uff0c\u4e0d\u540c\u73b0\u5b9e\u65f6\u95f4\u67e5\uff0c\u884c\u6570\u4e0d\u4e00\u6837\uff1f<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\ud83d\udc49 \u90a3\u6761\u591a\u51fa\u7684\u8bb0\u5f55\uff1a<code>testtime = '2026-08-08 10:10:10.997'<\/code>\uff08\u771f\u5b9e\u6570\u636e\u5e93\u5b58\u50a8\u65f6\u95f4\uff09<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>10:10:10.999 \u73b0\u5b9e\u65f6\u523b\u6267\u884c\u67e5\u8be2\u65f6\uff1a\u8fd9\u6761\u8bb0\u5f55\u8fd8\u6ca1\u6709\u63d2\u5165\u8868<\/strong>\uff0c\u6240\u4ee5\u8fd4\u56de 50<\/li>\n\n\n\n<li><strong>\u73b0\u5b9e\u65f6\u95f4\u8d70\u5230 10:12:10.999\uff0c\u8fd9\u6761\u6570\u636e\u5df2\u7ecf\u88ab\u4e1a\u52a1\u63d2\u5165\u5b8c\u6210<\/strong>\uff0c\u6761\u4ef6\u6ee1\u8db3\uff0c\u591a 1 \u884c\uff0c\u8fd4\u56de 51<\/li>\n<\/ol>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p class=\"wp-block-paragraph\">SQL \u6587\u672c\u6761\u4ef6\u5199\u6b7b\uff0c<strong>SQL \u8bed\u53e5\u672c\u8eab\u6ca1\u6709\u53d8\uff0c\u662f\u8868\u91cc\u9762\u591a\u63d2\u5165\u4e86\u4e00\u6761\u7b26\u5408\u6761\u4ef6\u7684\u65b0\u6570\u636e<\/strong>\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u4f60\u8bef\u4ee5\u4e3a\u67e5\u8be2\u5feb\u7167\u662f \u201c\u67e5\u8be2\u77ac\u95f4\u7684\u6570\u636e\u5e93\u201d\uff0c\u4f46\u786e\u5b9e\u5c31\u662f\uff1a10:10 \u70b9\u67e5\u8be2\u7684\u65f6\u5019\u8be5\u884c\u8fd8\u6ca1\u4ea7\u751f\uff0c2 \u5206\u949f\u540e\u6570\u636e\u843d\u5e93\u4e86\uff0c\u518d\u8dd1\u540c\u6837 where\uff0c\u81ea\u7136\u591a\u4e00\u884c\u3002<\/p>\n<\/blockquote>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\u6839\u56e0 2\uff1aWITH (NOLOCK) \u810f\u8bfb\uff08\u6b21\u9ad8\u6982\u7387\uff09<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><code>nolock<\/code> = \u8bfb\u672a\u63d0\u4ea4\u9694\u79bb\u7ea7\u522b\uff0c\u4f1a\u8bfb\u5230<strong>\u672a\u63d0\u4ea4\u4e8b\u52a1<\/strong>\u7684\u6570\u636e\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u573a\u666f\u8fd8\u539f\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>10:10:10.999 \u4f60\u7b2c\u4e00\u6b21\u6267\u884c SQL\uff1a \u53e6\u5916\u4f1a\u8bdd\u5f00\u59cb <code>insert xx testtime='2026-08-08 10:10:10.997'<\/code>\uff0c<strong>\u4e8b\u52a1\u8fd8\u6ca1 commit<\/strong>\u3002\n<ul class=\"wp-block-list\">\n<li>nolock\uff1a\u672a\u63d0\u4ea4\u7684\u6570\u636e\uff0c\u6709\u53ef\u80fd\u770b\u4e0d\u89c1\uff08\u53d6\u51b3\u4e8e\u9875\u9501\u72b6\u6001\uff09\u2192 \u8fd4\u56de 50 \u884c\u3002<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li>10:12:10.999 \u7b2c\u4e8c\u6b21\u6267\u884c SQL\uff1a \u90a3\u4e2a insert \u4e8b\u52a1\u5df2\u7ecf commit\uff0c\u6570\u636e\u6b63\u5f0f\u53ef\u89c1 \u2192 \u8fd4\u56de 51 \u884c\u3002<\/li>\n<\/ol>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p class=\"wp-block-paragraph\">\u26a0\ufe0f nolock \u4e0d\u4fdd\u8bc1\u6bcf\u6b21\u8fd4\u56de\u5b8c\u5168\u4e00\u81f4\u5feb\u7167\uff0c\u810f\u8bfb\u3001\u5e7b\u8bfb\u662f\u5b83\u7684\u56fa\u6709\u7279\u6027\uff0c<strong>\u4e0d\u80fd\u62ff\u6765\u505a\u62a5\u8868\u7edf\u8ba1\u3001\u6570\u636e\u5bf9\u8d26<\/strong>\u3002<\/p>\n<\/blockquote>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p class=\"wp-block-paragraph\">\u91cd\u70b9\u533a\u5206\uff1a\u4e0d\u662f SQL \u53d8\u4e86\uff0c\u662f<strong>\u6570\u636e\u5e93\u72b6\u6001\u53d1\u751f\u53d8\u5316\uff1a\u65b0\u589e\u6570\u636e \/ \u4e8b\u52a1\u63d0\u4ea4<\/strong>\u3002<\/p>\n<\/blockquote>\n\n\n\n<h2 class=\"wp-block-heading\">\u6839\u56e0 3\uff1a\u5e7b\u8bfb\uff08\u666e\u901a\u9694\u79bb\u7ea7\u522b\u4e5f\u4f1a\uff09<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u9ed8\u8ba4 READ COMMITTED\uff0c\u4e5f\u4f1a\u53d1\u751f\u5e7b\u8bfb\uff1a\u4e24\u6b21\u76f8\u540c\u67e5\u8be2\uff0c\u4e2d\u95f4\u522b\u7684\u4f1a\u8bdd insert \u7b26\u5408 where \u6761\u4ef6\u7684\u884c\uff0c\u7b2c\u4e8c\u6b21\u67e5\u8be2\u884c\u6570\u589e\u52a0\u3002\u8fd9\u662f\u6807\u51c6 SQL \u5e7b\u8bfb\u73b0\u8c61\u3002<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h1 class=\"wp-block-heading\">\u9a8c\u8bc1\u65b9\u6cd5\uff0c\u5feb\u901f\u5b9a\u4f4d<\/h1>\n\n\n\n<h3 class=\"wp-block-heading\">1\u3001\u786e\u8ba4 testtime \u5b57\u6bb5\u6570\u636e\u7c7b\u578b<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">sql<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>sp_help 'xx'\n<\/code><\/pre>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u5982\u679c\u662f <code>datetime<\/code> \u2192 \u6beb\u79d2\u820d\u5165\u5751\u5b9e\u9524\u3002<\/li>\n\n\n\n<li>\u5982\u679c\u662f <code>datetime2(3)<\/code> \u2192 \u6ca1\u6709 3.33ms \u820d\u5165\u95ee\u9898\u3002<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">2\u3001\u628a\u90a3\u6761\u591a\u51fa\u7684\u884c\u635e\u51fa\u6765<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u76f4\u63a5\u628a\u4e0a\u9650\u5f00\u5927\uff0c\u770b\u90a3\u4e00\u6761\u7684\u771f\u5b9e testtime\uff1a<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">sql<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>select testtime,* \nfrom xx with(nolock)\nwhere testtime&gt;'2026-08-08 08:10:10.321' \nand testtime &lt; '2026-08-08 10:10:11.000'\norder by testtime desc\n<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u770b\u6700\u5927\u7684\u90a3\u4e00\u6761\u7684<code>testtime<\/code>\u771f\u5b9e\u503c\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">3\u3001\u786e\u8ba4\u8fd9\u6761\u8bb0\u5f55\u7684\u751f\u6210\u65f6\u95f4<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u770b\u662f\u5426\u5c31\u662f\u5728 <code>10:10 ~10:12<\/code> \u4e4b\u95f4\u63d2\u5165\u7684\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u4fee\u590d\u5199\u6cd5\uff08\u65f6\u95f4\u8303\u56f4\u6807\u51c6\u6700\u4f73\u5b9e\u8df5\uff09<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">\u274c \u9519\u8bef\u5199\u6cd5\uff08datetime \u6781\u6613\u8e29\u5751\uff09<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">sql<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>testtime &lt; '2026-08-08 10:10:10.999'\n<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\">\u2705 \u63a8\u8350\u5199\u6cd5\uff08\u5de6\u95ed\u53f3\u5f00\uff0c\u901a\u7528\uff0cdatetime\/datetime2 \u5168\u90e8\u517c\u5bb9\uff09<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">sql<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>WHERE testtime &gt; '2026-08-08 08:10:10.321'\n  AND testtime &lt; '2026-08-08 10:10:11.000'\n<\/code><\/pre>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p class=\"wp-block-paragraph\">\u60f3\u8981\u622a\u6b62\u5230 10:10:10 \u8fd9\u4e00\u79d2\u5168\u90e8\u6570\u636e\uff0c\u4e0a\u9650\u76f4\u63a5\u5199<strong>\u4e0b\u4e00\u79d2\u96f6\u70b9<\/strong>\uff0c\u4e0d\u8981\u5199 999 \u6beb\u79d2\u3002<\/p>\n<\/blockquote>\n\n\n\n<h2 class=\"wp-block-heading\">\u5173\u4e8e nolock \u7684\u98ce\u9669\u63d0\u9192<\/h2>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p class=\"wp-block-paragraph\">\u505a\u7edf\u8ba1\u5bf9\u8d26\u3001\u5bfc\u51fa\u4e1a\u52a1\u6570\u636e\uff0c\u5f3a\u70c8\u4e0d\u5efa\u8bae\u4f7f\u7528<code>with(nolock)<\/code><\/p>\n<\/blockquote>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u810f\u8bfb\uff1a\u8bfb\u5230\u56de\u6eda\u7684\u5783\u573e\u6570\u636e<\/li>\n\n\n\n<li>\u5e7b\u8bfb\uff1a\u76f8\u540c SQL\uff0c\u4e0d\u540c\u65f6\u523b\u884c\u6570\u4e0d\u4e00\u81f4\uff08\u4f60\u73b0\u5728\u9047\u5230\u7684\uff09<\/li>\n\n\n\n<li>\u6709\u53ef\u80fd\u8bfb\u91cd\u590d\u884c\u3001\u6f0f\u884c\uff08\u5206\u914d\u9875\u62c6\u5206\uff0callocation scan\uff09<\/li>\n<\/ol>\n\n\n\n<p class=\"wp-block-paragraph\">\u5982\u679c\u8981\u5feb\u7167\u4e00\u81f4\u6027\uff0c\u5efa\u8bae\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u5f00\u542f\u6570\u636e\u5e93 <code>READ_COMMITTED_SNAPSHOT ON<\/code>\uff0c\u53bb\u6389 nolock\uff0c\u4f7f\u7528\u884c\u7248\u672c\u5feb\u7167\u8bfb\u53d6\u3002<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">\u590d\u76d8\u4f60\u7684\u73b0\u8c61\u603b\u7ed3<\/h2>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p class=\"wp-block-paragraph\">\u4f60\u7684 SQL \u8bed\u53e5<strong>where \u6761\u4ef6\u5b57\u7b26\u4e32\u5b8c\u5168\u6ca1\u53d8<\/strong>\uff0c\u4f46\u662f\u4e24\u6b21\u6267\u884c\uff0c\u5e95\u5c42\u8868\u7684\u6570\u636e\u53d1\u751f\u53d8\u5316\uff1a<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u7b2c\u4e00\u6b21\u67e5\u8be2\u65f6\uff0c\u90a3\u6761 51 \u884c\u7684\u6570\u636e\u8fd8\u4e0d\u5b58\u5728\uff08\u672a\u63d2\u5165 \/ \u672a\u63d0\u4ea4\uff09\uff1b<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u8fc7\u4e24\u5206\u949f\u6570\u636e insert+commit \u5b8c\u6210\uff0c\u518d\u6b21\u6267\u884c\u76f8\u540c where \u6761\u4ef6\uff0c\u81ea\u7136\u591a\u8fd4\u56de\u4e00\u884c\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><code>nolock<\/code>\u653e\u5927\u4e86\u8fd9\u4e2a\u73b0\u8c61\uff0c<code>datetime<\/code>\u6beb\u79d2\u820d\u5165\u5bb9\u6613\u5e72\u6270\u4f60\u5224\u65ad\u8fb9\u754c\u3002<br><br><br><br><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u603b\u4e4b\uff1asql server\u4f18\u5316\u548c\u4f7f\u7528\u95e8\u69db\u6709\u70b9\u9ad8\u3002\u65e5\u5fd7\u6587\u4ef6\u5927\uff0c\u4e8b\u52a1\u63d0\u4ea4\uff0c\u7535\u8111\u8d44\u6e90\u5403\u5b8c\u7b49\u3002<br><br><a href=\"https:\/\/www.bilibili.com\/opus\/1186900004562796560?spm_id_from=333.1387.0.0\">https:\/\/www.bilibili.com\/opus\/1186900004562796560?spm_id_from=333.1387.0.0<\/a><\/p>\n<\/blockquote>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u4f18\u5316\uff1a<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u5bfc\u51faTXT\uff08csv\uff09\u6570\u636e\u6709\u65f6\u5019\uff0c\u8fd8\u662f\u9760\u8c31\u3002   www.erwa.cn \u4e8c\u5a03\u5907\u5fd8<br><br>\u5b9e\u65f6\u6570\u636e\u5bfc\u51fa  lastdata.txt   \u5b9e\u65f6\u8986\u76d6\uff0c\u53ea\u4fdd\u7559\u4e00\u6761\u6570\u636e\u6216\u8005\u4e00\u4e2a\u4ea7\u54c1\u6216\u8005\u4e00\u6b21\u6d4b\u8bd5\u7684\u6570\u636e\u3002<br>\u5386\u53f2\u6570\u636e\u5bfc\u51fa  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