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15 lines
984 B
Markdown
15 lines
984 B
Markdown
<a name="data_types-string"></a>
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# String
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Strings of an arbitrary length. The length is not limited. The value can contain an arbitrary set of bytes, including null bytes.
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The String type replaces the types VARCHAR, BLOB, CLOB, and others from other DBMSs.
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## Encodings
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ClickHouse doesn't have the concept of encodings. Strings can contain an arbitrary set of bytes, which are stored and output as-is.
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If you need to store texts, we recommend using UTF-8 encoding. At the very least, if your terminal uses UTF-8 (as recommended), you can read and write your values without making conversions.
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Similarly, certain functions for working with strings have separate variations that work under the assumption that the string contains a set of bytes representing a UTF-8 encoded text.
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For example, the 'length' function calculates the string length in bytes, while the 'lengthUTF8' function calculates the string length in Unicode code points, assuming that the value is UTF-8 encoded.
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