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doc-exports/docs/dws/tool/dws_16_0180.html
luhuayi a5e3903f6b DWS TG 910.211 version 
Reviewed-by: Pruthi, Vineet <vineet.pruthi@t-systems.com>
Co-authored-by: luhuayi <luhuayi@huawei.com>
Co-committed-by: luhuayi <luhuayi@huawei.com>
2025-04-23 13:53:01 +00:00

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<a name="EN-US_TOPIC_0000001813438896"></a><a name="EN-US_TOPIC_0000001813438896"></a>
<h1 class="topictitle1">INTERVAL</h1>
<div id="body8662426"><p id="EN-US_TOPIC_0000001813438896__en-us_topic_0000001391841108_p16581841135716">In MySQL, the interval expression format is <strong id="EN-US_TOPIC_0000001813438896__en-us_topic_0000001391841108_b34072118423">INTERVAL N</strong>, which is not supported by GaussDB(DWS) and needs to be converted to <strong id="EN-US_TOPIC_0000001813438896__en-us_topic_0000001391841108_b17204121984220">INTERVAL'N'</strong>.</p>
<p id="EN-US_TOPIC_0000001813438896__en-us_topic_0000001391841108_p14581541125710"><strong id="EN-US_TOPIC_0000001813438896__en-us_topic_0000001391841108_b17662071558">Input</strong></p>
<div class="codecoloring" codetype="Sql" id="EN-US_TOPIC_0000001813438896__en-us_topic_0000001391841108_screen341820141654"><div class="highlight"><table class="highlighttable"><tr><td class="linenos"><div class="linenodiv"><pre><span class="normal">1</span>
<span class="normal">2</span>
<span class="normal">3</span>
<span class="normal">4</span>
<span class="normal">5</span>
<span class="normal">6</span></pre></div></td><td class="code"><div><pre><span></span><span class="k">SELECT</span><span class="w"> </span><span class="k">CURRENT_TIME</span><span class="p">()</span><span class="w"> </span><span class="o">-</span><span class="w"> </span><span class="nb">INTERVAL</span><span class="w"> </span><span class="mi">4</span><span class="w"> </span><span class="k">DAY</span><span class="p">;</span>
<span class="k">SELECT</span><span class="w"> </span><span class="n">NOW</span><span class="p">()</span><span class="w"> </span><span class="o">-</span><span class="w"> </span><span class="nb">INTERVAL</span><span class="w"> </span><span class="mi">5</span><span class="w"> </span><span class="n">HOUR</span><span class="p">;</span>
<span class="k">SELECT</span><span class="w"> </span><span class="k">CURRENT_TIME</span><span class="p">()</span><span class="w"> </span><span class="o">-</span><span class="w"> </span><span class="nb">INTERVAL</span><span class="w"> </span><span class="s1">'4'</span><span class="w"> </span><span class="k">DAY</span><span class="p">;</span>
<span class="k">SELECT</span><span class="w"> </span><span class="n">NOW</span><span class="p">()</span><span class="w"> </span><span class="o">-</span><span class="w"> </span><span class="nb">INTERVAL</span><span class="w"> </span><span class="s1">'5'</span><span class="w"> </span><span class="n">HOUR</span><span class="p">;</span>
<span class="k">SELECT</span><span class="w"> </span><span class="k">CURRENT_TIME</span><span class="p">()</span><span class="w"> </span><span class="o">-</span><span class="w"> </span><span class="nb">INTERVAL</span><span class="w"> </span><span class="ss">&quot;4&quot;</span><span class="w"> </span><span class="k">DAY</span><span class="p">;</span>
<span class="k">SELECT</span><span class="w"> </span><span class="n">NOW</span><span class="p">()</span><span class="w"> </span><span class="o">-</span><span class="w"> </span><span class="nb">INTERVAL</span><span class="w"> </span><span class="ss">&quot;5&quot;</span><span class="w"> </span><span class="n">HOUR</span><span class="p">;</span>
</pre></div></td></tr></table></div>
</div>
<p id="EN-US_TOPIC_0000001813438896__en-us_topic_0000001391841108_p15581104118577"><strong id="EN-US_TOPIC_0000001813438896__en-us_topic_0000001391841108_b847116102510">Output</strong></p>
<div class="codecoloring" codetype="Sql" id="EN-US_TOPIC_0000001813438896__en-us_topic_0000001391841108_screen1331120858"><div class="highlight"><table class="highlighttable"><tr><td class="linenos"><div class="linenodiv"><pre><span class="normal">1</span>
<span class="normal">2</span>
<span class="normal">3</span>
<span class="normal">4</span>
<span class="normal">5</span>
<span class="normal">6</span></pre></div></td><td class="code"><div><pre><span></span><span class="k">SELECT</span><span class="w"> </span><span class="p">(</span><span class="k">CURRENT_TIME</span><span class="w"> </span><span class="p">()</span><span class="w"> </span><span class="o">-</span><span class="w"> </span><span class="nb">INTERVAL</span><span class="w"> </span><span class="s1">'4'</span><span class="w"> </span><span class="k">DAY</span><span class="p">);</span>
<span class="k">SELECT</span><span class="w"> </span><span class="p">(</span><span class="n">NOW</span><span class="w"> </span><span class="p">()</span><span class="w"> </span><span class="o">-</span><span class="w"> </span><span class="nb">INTERVAL</span><span class="w"> </span><span class="s1">'5'</span><span class="w"> </span><span class="n">HOUR</span><span class="p">);</span>
<span class="k">SELECT</span><span class="w"> </span><span class="p">(</span><span class="k">CURRENT_TIME</span><span class="w"> </span><span class="p">()</span><span class="w"> </span><span class="o">-</span><span class="w"> </span><span class="nb">INTERVAL</span><span class="w"> </span><span class="s1">'4'</span><span class="w"> </span><span class="k">DAY</span><span class="p">);</span>
<span class="k">SELECT</span><span class="w"> </span><span class="p">(</span><span class="n">NOW</span><span class="w"> </span><span class="p">()</span><span class="w"> </span><span class="o">-</span><span class="w"> </span><span class="nb">INTERVAL</span><span class="w"> </span><span class="s1">'5'</span><span class="w"> </span><span class="n">HOUR</span><span class="p">);</span>
<span class="k">SELECT</span><span class="w"> </span><span class="p">(</span><span class="k">CURRENT_TIME</span><span class="w"> </span><span class="p">()</span><span class="w"> </span><span class="o">-</span><span class="w"> </span><span class="nb">INTERVAL</span><span class="w"> </span><span class="s1">'4'</span><span class="w"> </span><span class="k">DAY</span><span class="p">);</span>
<span class="k">SELECT</span><span class="w"> </span><span class="p">(</span><span class="n">NOW</span><span class="w"> </span><span class="p">()</span><span class="w"> </span><span class="o">-</span><span class="w"> </span><span class="nb">INTERVAL</span><span class="w"> </span><span class="s1">'5'</span><span class="w"> </span><span class="n">HOUR</span><span class="p">);</span>
</pre></div></td></tr></table></div>
</div>
</div>
<div>
<div class="familylinks">
<div class="parentlink"><strong>Parent topic:</strong> <a href="dws_16_0177.html">Data Manipulation Language (DML)</a></div>
</div>
</div>
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