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class=\"type\">interval</code> 类型还有一个附加选项，可以通过写出下面这些短语之一来限制所存储字段的集合：\n</p><p>\n    注意，如果同时指定了 <em class=\"replaceable\"><code>fields</code></em> 和\n    <em class=\"replaceable\"><code>p</code></em>，那么\n    <em class=\"replaceable\"><code>fields</code></em> 必须包含\n    <code class=\"literal\">SECOND</code>，因为精度只作用于秒。\n   </p><p><a href=\"/zh/docs/18/datatype-datetime.html\">查看完整中文手册与上下文</a>。</p>"}, "summary": "日期和时间，包含时区", "version": "18", "link_map": {"/zh/docs/18/datatype-datetime.html": "/docs/18/datatype-datetime.html", "/zh/docs/18/functions-datetime.html": "/docs/18/functions-datetime.html", "/zh/docs/18/datetime-units-history.html": "/docs/18/datetime-units-history.html", "/zh/docs/18/datatype-datetime.html#DATATYPE-DATETIME-TABLE": "/docs/18/datatype-datetime.html#DATATYPE-DATETIME-TABLE"}, "body_html": "<p>日期和时间，包含时区</p><h3>同版本中文手册节选</h3><p>\n<span>PostgreSQL</span> 支持完整的一组\n    <acronym>SQL</acronym> 日期和时间类型，如<a href=\"/zh/docs/18/datatype-datetime.html#DATATYPE-DATETIME-TABLE\" rel=\"nofollow\">表 8.9</a> 所示。这些数据类型上可用的操作见<a href=\"/zh/docs/18/functions-datetime.html\" rel=\"nofollow\">第 9.9 节</a>。日期按格里高利历计算，即使是在该历法启用之前的年份也是如此（更多信息见<a href=\"/zh/docs/18/datetime-units-history.html\" rel=\"nofollow\">第 B.6 节</a>）。\n   </p><p>\n<code>time</code>、<code>timestamp</code> 和 <code>interval</code>\n     都接受一个可选精度值 <em><code>p</code></em>，用来指定在秒字段中保留多少位小数。默认情况下，对精度没有显式上界。<em><code>p</code></em> 的允许范围是 0 到 6。\n   </p><p>\n<code>interval</code> 类型还有一个附加选项，可以通过写出下面这些短语之一来限制所存储字段的集合：\n</p><p>\n    注意，如果同时指定了 <em><code>fields</code></em> 和\n    <em><code>p</code></em>，那么\n    <em><code>fields</code></em> 必须包含\n    <code>SECOND</code>，因为精度只作用于秒。\n   </p><p><a href=\"/zh/docs/18/datatype-datetime.html\" rel=\"nofollow\">查看完整中文手册与上下文</a>。</p>", "body_sha256": "2508c3982f550237cbd2949648aebb258602f9871cf610a3c0f570bcdb6b704a", "content_hash": "ccef7a7ec71c31dece2daf40a79e6fc5e10b6cd4262a489feaddd02f2c72bd9f", "source_database": "center", "source_revision": 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"opckeytype": "0"}, {"opcname": "timestamptz_ops", "opcfamily": "hash/timestamptz_ops", "opcintype": "timestamptz", "opcmethod": "hash", "opcdefault": "t", "opckeytype": "0"}]}, "comparison_hash": "b7c8b3f9894589d926d05ae608ed12f5c51cc8bc49b3c509e30838528162e5fd", "manual_language": "zh", "operator_classes": [{"oid": "3127", "opcname": "timestamptz_ops", "opcowner": "POSTGRES", "opcfamily": "btree/datetime_ops", "opcintype": "timestamptz", "opcmethod": "btree", "oid_symbol": "TIMESTAMPTZ_BTREE_OPS_OID", "opcdefault": "t", "opckeytype": "0", "opcnamespace": "pg_catalog"}, {"opcname": "timestamptz_ops", "opcowner": "POSTGRES", "opcfamily": "hash/timestamptz_ops", "opcintype": "timestamptz", "opcmethod": "hash", "opcdefault": "t", "opckeytype": "0", "opcnamespace": "pg_catalog"}, {"opcname": "timestamptz_minmax_ops", "opcowner": "POSTGRES", "opcfamily": "brin/datetime_minmax_ops", "opcintype": "timestamptz", "opcmethod": "brin", "opcdefault": "t", "opckeytype": "timestamptz", "opcnamespace": "pg_catalog"}, {"opcname": "timestamptz_minmax_multi_ops", "opcowner": "POSTGRES", "opcfamily": "brin/datetime_minmax_multi_ops", "opcintype": "timestamptz", "opcmethod": "brin", "opcdefault": "f", "opckeytype": "timestamptz", "opcnamespace": "pg_catalog"}, {"opcname": "timestamptz_bloom_ops", "opcowner": "POSTGRES", "opcfamily": "brin/datetime_bloom_ops", "opcintype": "timestamptz", "opcmethod": "brin", "opcdefault": "f", "opckeytype": "timestamptz", "opcnamespace": "pg_catalog"}], "description_zh_html": "<p>日期和时间，包含时区</p><h3>同版本中文手册节选</h3><p>\n<span>PostgreSQL</span> 支持完整的一组\n    <acronym>SQL</acronym> 日期和时间类型，如<a href=\"/zh/docs/18/datatype-datetime.html#DATATYPE-DATETIME-TABLE\" rel=\"nofollow\">表 8.9</a> 所示。这些数据类型上可用的操作见<a href=\"/zh/docs/18/functions-datetime.html\" rel=\"nofollow\">第 9.9 节</a>。日期按格里高利历计算，即使是在该历法启用之前的年份也是如此（更多信息见<a href=\"/zh/docs/18/datetime-units-history.html\" rel=\"nofollow\">第 B.6 节</a>）。\n   </p><p>\n<code>time</code>、<code>timestamp</code> 和 <code>interval</code>\n     都接受一个可选精度值 <em><code>p</code></em>，用来指定在秒字段中保留多少位小数。默认情况下，对精度没有显式上界。<em><code>p</code></em> 的允许范围是 0 到 6。\n   </p><p>\n<code>interval</code> 类型还有一个附加选项，可以通过写出下面这些短语之一来限制所存储字段的集合：\n</p><p>\n    注意，如果同时指定了 <em><code>fields</code></em> 和\n    <em><code>p</code></em>，那么\n    <em><code>fields</code></em> 必须包含\n    <code>SECOND</code>，因为精度只作用于秒。\n   </p><p><a href=\"/zh/docs/18/datatype-datetime.html\" rel=\"nofollow\">查看完整中文手册与上下文</a>。</p>", "manual_documentation": "dedicated family chapter", "center_zh_rendered": "<p>日期和时间，包含时区</p><h3>同版本中文手册节选</h3><p>\n<span>PostgreSQL</span> 支持完整的一组\n    SQL 日期和时间类型，如<a href=\"/docs/18/datatype-datetime.html#DATATYPE-DATETIME-TABLE\">表 8.9</a> 所示。这些数据类型上可用的操作见<a href=\"/docs/18/functions-datetime.html\">第 9.9 节</a>。日期按格里高利历计算，即使是在该历法启用之前的年份也是如此（更多信息见<a href=\"/docs/18/datetime-units-history.html\">第 B.6 节</a>）。\n   </p><p>\n<code>time</code>、<code>timestamp</code> 和 <code>interval</code>\n     都接受一个可选精度值 <em><code>p</code></em>，用来指定在秒字段中保留多少位小数。默认情况下，对精度没有显式上界。<em><code>p</code></em> 的允许范围是 0 到 6。\n   </p><p>\n<code>interval</code> 类型还有一个附加选项，可以通过写出下面这些短语之一来限制所存储字段的集合：\n</p><p>\n    注意，如果同时指定了 <em><code>fields</code></em> 和\n    <em><code>p</code></em>，那么\n    <em><code>fields</code></em> 必须包含\n    <code>SECOND</code>，因为精度只作用于秒。\n   </p><p><a href=\"/docs/18/datatype-datetime.html\">查看完整中文手册与上下文</a>。</p>"}, "from": "17", "comparison": {"available": true, "changes": [], "prose_changed": false}}