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>
44 lines
2.6 KiB
HTML
44 lines
2.6 KiB
HTML
<a name="EN-US_TOPIC_0000001819416285"></a><a name="EN-US_TOPIC_0000001819416285"></a>
|
|
|
|
<h1 class="topictitle1">LIMIT</h1>
|
|
<div id="body8662426"><p id="EN-US_TOPIC_0000001819416285__en-us_topic_0000001657865374_en-us_topic_0000001438131241_en-us_topic_0214164556_p1517232891914">UPDATE LIMIT syntax can be used to limit the scope. A clause is a limit on row matching. As long as the rows that satisfy the clause are found, the statements will stop, regardless of whether they have actually changed.</p>
|
|
<p id="EN-US_TOPIC_0000001819416285__en-us_topic_0000001657865374_en-us_topic_0000001438131241_en-us_topic_0214164556_p8060118"><strong id="EN-US_TOPIC_0000001819416285__en-us_topic_0000001657865374_en-us_topic_0000001438131241_en-us_topic_0214164556_b462343552212">Input</strong></p>
|
|
<pre class="screen" id="EN-US_TOPIC_0000001819416285__en-us_topic_0000001657865374_en-us_topic_0000001438131241_en-us_topic_0214164556_screen138616389229"># LIMIT
|
|
UPDATE employees SET department_id=department_id+1 LIMIT 3 ;
|
|
UPDATE employees SET department_id=department_id+1 LIMIT 3 , 10 ;
|
|
|
|
# LIMIT + OFFSET
|
|
UPDATE employees SET department_id=department_id+1 LIMIT 3 OFFSET 2;
|
|
|
|
# LIMIT + ORDER BY
|
|
UPDATE employees SET department_id=department_id+1 ORDER BY fname LIMIT 3 ;
|
|
|
|
# LIMIT + WHERE + ORDER BY
|
|
UPDATE employees SET department_id=department_id+1 WHERE id<5 ORDER BY fname LIMIT 3 ;
|
|
|
|
# LIMIT + WHERE + ORDER BY + OFFSET
|
|
UPDATE employees SET department_id=department_id+1 WHERE id<5 ORDER BY fname LIMIT 3 OFFSET 2 ;</pre>
|
|
<p id="EN-US_TOPIC_0000001819416285__en-us_topic_0000001657865374_en-us_topic_0000001438131241_en-us_topic_0214164556_p19586832152712"><strong id="EN-US_TOPIC_0000001819416285__en-us_topic_0000001657865374_en-us_topic_0000001438131241_en-us_topic_0214164556_b15245144242914">Output</strong></p>
|
|
<pre class="screen" id="EN-US_TOPIC_0000001819416285__en-us_topic_0000001657865374_en-us_topic_0000001438131241_en-us_topic_0214164556_screen196344592911">-- LIMIT
|
|
UPDATE "public"."employees" SET "department_id" = department_id+1;
|
|
UPDATE "public"."employees" SET "department_id" = department_id+1;
|
|
|
|
-- LIMIT + OFFSET
|
|
UPDATE "public"."employees" SET "department_id" = department_id+1;
|
|
|
|
-- LIMIT + ORDER BY
|
|
UPDATE "public"."employees" SET "department_id" = department_id+1;
|
|
|
|
-- LIMIT + WHERE + ORDER BY
|
|
UPDATE "public"."employees" SET "department_id" = department_id+1 WHERE id<5;
|
|
|
|
-- LIMIT + WHERE + ORDER BY + OFFSET
|
|
UPDATE "public"."employees" SET "department_id" = department_id+1 WHERE id<5;</pre>
|
|
</div>
|
|
<div>
|
|
<div class="familylinks">
|
|
<div class="parentlink"><strong>Parent topic:</strong> <a href="dws_16_0193.html">UPDATE</a></div>
|
|
</div>
|
|
</div>
|
|
|