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Add Select Rows After An Offset as a MySQL TIL

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jbranchaud
2023-12-11 12:50:25 -06:00
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commit ff2f3635cb
2 changed files with 34 additions and 1 deletions

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For a steady stream of TILs, [sign up for my newsletter](https://crafty-builder-6996.ck.page/e169c61186).
_1357 TILs and counting..._
_1358 TILs and counting..._
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@@ -566,6 +566,7 @@ _1357 TILs and counting..._
- [Dump A Database To A File](mysql/dump-a-database-to-a-file.md)
- [Ignore Duplicates When Inserting Records](mysql/ignore-duplicates-when-inserting-records.md)
- [List Databases And Tables](mysql/list-databases-and-tables.md)
- [Select Rows After An Offset](mysql/select-rows-after-an-offset.md)
- [Show Create Statement For A Table](mysql/show-create-statement-for-a-table.md)
- [Show Tables That Match A Pattern](mysql/show-tables-that-match-a-pattern.md)
- [Show Indexes For A Table](mysql/show-indexes-for-a-table.md)

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# Select Rows After An Offset
When doing pagination and other queries for special-case scenarios, we may need
to grab rows after a certain offset.
There are two variations of the MySQL syntax for selecting rows after a certain
offset.
```sql
select * from events limit 100, 10;
```
This first query will grab up to 10 rows after applying an offset of 100.
Typically we'll see a `limit` clause with just one value which represents how
many rows to limit the result set to. However, if we optionally include `N, `
in the middle of that clause. Whatever number `N` is will be the offset.
Another way to write this is:
```sql
select * from events limit 10 offset 100;
```
This gets the same result: 10 rows after an offset of 100. This is perhaps a
bit more straightforward and reduces the chance that we forget which value is
which like we might in the first syntax variation.
Note: row ordering is only deterministic if you specify an order. To get
consistent results with `offset`, you'll most likely want to be specifying an
`order by` clause as well.
[source](https://dev.mysql.com/doc/refman/8.0/en/select.html)