> ## Documentation Index
> Fetch the complete documentation index at: https://private-7c7dfe99-mintlify-8a08bda2.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.
> Documentation for the RawBLOB format
# RawBLOB
Description
The `RawBLOB` formats reads all input data to a single value. It is possible to parse only a table with a single field of type [`String`](/reference/data-types/string) or similar.
The result is output as a binary format without delimiters and escaping. If more than one value is output, the format is ambiguous, and it will be impossible to read the data back.
Below is a comparison of the formats `RawBLOB` and [`TabSeparatedRaw`](/reference/formats/TabSeparated/TabSeparatedRaw).
`RawBLOB`:
* data is output in binary format, no escaping;
* there are no delimiters between values;
* no new-line at the end of each value.
`TabSeparatedRaw`:
* data is output without escaping;
* the rows contain values separated by tabs;
* there is a line feed after the last value in every row.
The following is a comparison of the `RawBLOB` and [RowBinary](/reference/formats/RowBinary/RowBinary) formats.
`RawBLOB`:
* String fields are output without being prefixed by length.
`RowBinary`:
* String fields are represented as length in varint format (unsigned \[LEB128] ([https://en.wikipedia.org/wiki/LEB128](https://en.wikipedia.org/wiki/LEB128))), followed by the bytes of the string.
When empty data is passed to the `RawBLOB` input, ClickHouse throws an exception:
```text theme={null}
Code: 108. DB::Exception: No data to insert
```
Example usage
```bash title="Query" theme={null}
$ clickhouse-client --query "CREATE TABLE {some_table} (a String) ENGINE = Memory;"
$ cat {filename} | clickhouse-client --query="INSERT INTO {some_table} FORMAT RawBLOB"
$ clickhouse-client --query "SELECT * FROM {some_table} FORMAT RawBLOB" | md5sum
```
```text title="Response" theme={null}
f9725a22f9191e064120d718e26862a9 -
```