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Add example for OCT() #16959

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Apr 10, 2024
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Add example for OCT() #16959

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Add example for OCT()
dveeden Apr 3, 2024
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Update functions-and-operators/string-functions.md
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45 changes: 43 additions & 2 deletions functions-and-operators/string-functions.md
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Expand Up @@ -1180,11 +1180,52 @@ Negation of simple pattern matching.

### [`NOT REGEXP`](https://dev.mysql.com/doc/refman/8.0/en/regexp.html#operator_not-regexp)

Negation of `REGEXP`.
Negation of [`REGEXP`](#regexp).

### [`OCT()`](https://dev.mysql.com/doc/refman/8.0/en/string-functions.html#function_oct)

Return a string containing octal representation of a number.
Return a string containing octal (base 7) representation of a number.
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Examples:

In the example below you can see that the decimal values 1 to 7 are identical to the octal numbers. The numbers 8 until 15 in decimal match with 10 to 17 octal.
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```sql
WITH RECURSIVE nr(n) AS (
SELECT 1 AS n
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UNION ALL
SELECT n+1 FROM nr WHERE n<20
)
SELECT n, OCT(n) FROM nr;
```

```
+------+--------+
| n | OCT(n) |
+------+--------+
| 1 | 1 |
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| 2 | 2 |
| 3 | 3 |
| 4 | 4 |
| 5 | 5 |
| 6 | 6 |
| 7 | 7 |
| 8 | 10 |
| 9 | 11 |
| 10 | 12 |
| 11 | 13 |
| 12 | 14 |
| 13 | 15 |
| 14 | 16 |
| 15 | 17 |
| 16 | 20 |
| 17 | 21 |
| 18 | 22 |
| 19 | 23 |
| 20 | 24 |
+------+--------+
20 rows in set (0.00 sec)
```

### [`OCTET_LENGTH()`](https://dev.mysql.com/doc/refman/8.0/en/string-functions.html#function_octet-length)

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