docs/sql-manual/sql-functions/encrypt-digest-functions/sha2.md

---
{
"title": "SHA2",
"language": "en"
}
---

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### description

Use SHA2 to digest the message.

### Syntax

```sql
SHA2(str, digest_length)
```

### Paramters

- `str`: content to be encrypted
- `digest_length`: the length of the digest. Support 224, 256, 384, 512

### example

```SQL
select sha2('abc', 224);
```

```
+----------------------------------------------------------+
| sha2('abc', 224)                                         |
+----------------------------------------------------------+
| 23097d223405d8228642a477bda255b32aadbce4bda0b3f7e36c9da7 |
+----------------------------------------------------------+
```

```sql
select sha2('abc', 384);
```

```
+--------------------------------------------------------------------------------------------------+
| sha2('abc', 384)                                                                                 |
+--------------------------------------------------------------------------------------------------+
| cb00753f45a35e8bb5a03d699ac65007272c32ab0eded1631a8b605a43ff5bed8086072ba1e7cc2358baeca134c825a7 |
+--------------------------------------------------------------------------------------------------+
```

```sql
select sha2(NULL, 512);
```

```
+-----------------+
| sha2(NULL, 512) |
+-----------------+
| NULL            |
+-----------------+
```