forked from docs/doc-exports
Lu, Huayi
27019c2991
Reviewed-by: Hasko, Vladimir <vladimir.hasko@t-systems.com> Reviewed-by: Pruthi, Vineet <vineet.pruthi@t-systems.com> Co-authored-by: Lu, Huayi <luhuayi@huawei.com> Co-committed-by: Lu, Huayi <luhuayi@huawei.com>
48 lines
1.8 KiB
HTML
48 lines
1.8 KiB
HTML
<a name="EN-US_TOPIC_0000001819336209"></a><a name="EN-US_TOPIC_0000001819336209"></a>
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<h1 class="topictitle1">WITH AS</h1>
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<div id="body8662426"><p id="EN-US_TOPIC_0000001819336209__en-us_topic_0000001706104853_en-us_topic_0000001398422534_p1976018713611">WITH AS is used in GaussDB(DWS) to declare one or more subqueries that can be referenced by name in the main query. It is equivalent to a temporary table. DSC supports this keyword, which is retained in the migration.</p>
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<p id="EN-US_TOPIC_0000001819336209__en-us_topic_0000001706104853_en-us_topic_0000001398422534_p46401768376"><strong id="EN-US_TOPIC_0000001819336209__en-us_topic_0000001706104853_en-us_topic_0000001398422534_b1664013673712">Input</strong></p>
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<pre class="screen" id="EN-US_TOPIC_0000001819336209__en-us_topic_0000001706104853_en-us_topic_0000001398422534_screen364015611376">with e as (
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select city, sum(population) from t1 group by city
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),
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d as (
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select max(music) as max_music, min(music) as min_music from student
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),
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s as (
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select * from subject
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)
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select * from e;</pre>
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<p id="EN-US_TOPIC_0000001819336209__en-us_topic_0000001706104853_en-us_topic_0000001398422534_p186401060379"><strong id="EN-US_TOPIC_0000001819336209__en-us_topic_0000001706104853_en-us_topic_0000001398422534_b664012693717">Output</strong></p>
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<pre class="screen" id="EN-US_TOPIC_0000001819336209__en-us_topic_0000001706104853_en-us_topic_0000001398422534_screen96401763378">WITH e AS (
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SELECT
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city, sum(population)
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FROM
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t1
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GROUP BY
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city
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),
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d AS (
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SELECT
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max(music) AS "max_music", min(music) AS "min_music"
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FROM
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student
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),
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s AS (
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SELECT
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*
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FROM
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subject
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)
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SELECT
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*
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FROM
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e;</pre>
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</div>
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<div>
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<div class="familylinks">
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<div class="parentlink"><strong>Parent topic:</strong> <a href="dws_16_0119.html">Table (Optional Parameters and Operations)</a></div>
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</div>
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</div>
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