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Diffstat (limited to 'blog/dst/rss.xml')
| -rw-r--r-- | blog/dst/rss.xml | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/blog/dst/rss.xml b/blog/dst/rss.xml index eea52d2..4a949b8 100644 --- a/blog/dst/rss.xml +++ b/blog/dst/rss.xml @@ -13,8 +13,8 @@ <copyright>Copyright 2021 David Luévano Alvarado</copyright> <managingEditor>david@luevano.xyz (David Luévano Alvarado)</managingEditor> <webMaster>david@luevano.xyz (David Luévano Alvarado)</webMaster> - <pubDate>Sun, 06 Jun 2021 00:30:52 GMT</pubDate> - <lastBuildDate>Sun, 06 Jun 2021 00:30:52 GMT</lastBuildDate> + <pubDate>Sun, 06 Jun 2021 04:16:37 GMT</pubDate> + <lastBuildDate>Sun, 06 Jun 2021 04:16:37 GMT</lastBuildDate> <generator>pyssg v0.5.5</generator> <docs>https://validator.w3.org/feed/docs/rss2.html</docs> <ttl>30</ttl> @@ -1096,10 +1096,12 @@ function_name () { <li><code>RIGHT (OUTER) JOIN</code>: returns all records from the right table, and the matched records from the left table.</li> <li><code>FULL (OUTER) JOIN</code>: returns all records when there is a match in either left or right table.</li> </ul> +<div class="img-grid"> <p><img alt="INNER JOIN" src="images/b/notes/sql/img_innerjoin.gif"> <img alt="LEFT JOIN" src="images/b/notes/sql/img_leftjoin.gif"> <img alt="RIGHT JOIN" src="images/b/notes/sql/img_rightjoin.gif"> <img alt="FULL OUTER JOIN" src="images/b/notes/sql/img_fulljoin.gif"></p> +</div> <h4 id="nested-queries">Nested queries</h4> <p>A query composed of multiple select statements to get a specific piece of information. This is self explanatory, you do a <code>SELECT</code> query somewhere inside another one, for example <code>SELECT ... IN (SELECT ...)</code>, where the nesting is occurring inside the parenthesis after the <code>IN</code> statement.</p> <p>A nesting isn’t constrained to the <code>IN</code> statement, it can appear anywhere, for example in a <code>WHERE</code> statement: <code>SELECT ... WHERE something = (SELECT ...)</code>.</p> |