readme: add second query

This commit is contained in:
0x1eef 2022-07-11 18:26:55 -03:00
parent d643afac9e
commit 6c874d05bb

View file

@ -200,6 +200,8 @@ sqlite>
**4. Query the database** **4. Query the database**
4.1
After steps two and three, the database is fully populated and exists in memory / RAM. We can now query the database and its contents. The SQL query we will execute fetches the After steps two and three, the database is fully populated and exists in memory / RAM. We can now query the database and its contents. The SQL query we will execute fetches the
contents of chapter 112 in the English locale (i.e: `en`): contents of chapter 112 in the English locale (i.e: `en`):
@ -231,6 +233,41 @@ en 112 3 He has never had offspring, nor was He born.
en 112 4 And there is none comparable to Him.” en 112 4 And there is none comparable to Him.”
``` ```
4.2
The next query we will execute demonstrates how to find a particular word or
phrse in the english translation of The Qur'an, using the LIKE operator:
```sql
SELECT qurans.locale,
chapters.number as chapter,
verses.number as verse,
verses.content from verses
INNER JOIN qurans ON qurans.id = verses.quran_id
INNER JOIN chapters ON chapters.id = verses.chapter_id
WHERE qurans.locale = "en" AND
verses.content LIKE '%reflected light%';
```
The output should look like this:
```
sqlite> SELECT qurans.locale,
...> chapters.number as chapter,
...> verses.number as verse,
...> verses.content from verses
...> INNER JOIN qurans ON qurans.id = verses.quran_id
...> INNER JOIN chapters ON chapters.id = verses.chapter_id
...> WHERE qurans.locale = "en" AND
...> verses.content LIKE '%reflected light%';
locale chapter verse content
------ ------- ----- ------------------------------------------------------------
en 10 5 He is the One Who made the sun a radiant source and the moon
a reflected light, with precisely ordained phases, so that
you may know the number of years and calculation ˹of time˺.
Allah did not create all this except for a purpose. He makes
the signs clear for people of knowledge.
```
### <a id='bin-directory'>`bin/` directory</a> ### <a id='bin-directory'>`bin/` directory</a>