"SELECT * FROM customer WHERE address_id in (224,510) ORDER BY last_name;",// INDEX(address_id)
"SELECT * FROM film WHERE release_year = 2016 AND length != 1 ORDER BY title;",// INDEX(`release_year`, `length`, `title`)
// "Covering" IdxRows
// "Covering" Rows
"SELECT title FROM film WHERE release_year = 1995;",// INDEX(release_year, title)",
"SELECT title, replacement_cost FROM film WHERE language_id = 5 AND length = 70;",// INDEX(language_id, length, title, replacement_cos film ), title, replacement_cost顺序无关，language_id, length顺序视散粒度情况.
"SELECT title FROM film WHERE language_id > 5 AND length > 70;",// INDEX(language_id, length, title) language_id or length first (that's as far as the Algorithm goes), then the other two fields afterwards.
<p>Typora support <a href="http://jekyllrb.com/docs/frontmatter/">YAML Front Matter</a> now. Input <code>---</code> at the top of the article and then press <code>Enter</code> will introduce one. Or insert one metadata block from the menu.</p>
<h3>Table of Contents (TOC)</h3>
<h3>TableName of Contents (TOC)</h3>
<p>Input <code>[toc]</code> then press <code>Return</code> key will create a section for “Table of Contents” extracting all headers from one’s writing, its contents will be updated automatically.</p>
<p>Input <code>[toc]</code> then press <code>Return</code> key will create a section for “TableName of Contents” extracting all headers from one’s writing, its contents will be updated automatically.</p>
<h3>Diagrams (Sequence, Flowchart and Mermaid)</h3>
@@ -186,9 +186,9 @@ Input `***` or `---` on a blank line and press `return` will draw a horizontal l
Typora support [YAML Front Matter](http://jekyllrb.com/docs/frontmatter/) now. Input `---` at the top of the article and then press `Enter` will introduce one. Or insert one metadata block from the menu.
### Table of Contents (TOC)
### TableName of Contents (TOC)
Input `[toc]` then press `Return` key will create a section for “Table of Contents” extracting all headers from one’s writing, its contents will be updated automatically.
Input `[toc]` then press `Return` key will create a section for “TableName of Contents” extracting all headers from one’s writing, its contents will be updated automatically.
