Categories:: String & binary functions (Case Conversion)

LOWER¶

Returns the input string with all characters converted to lowercase.

Syntax¶

LOWER( <expr> )

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Arguments¶

expr: The string expression.

Returns¶

This function returns a value of type VARCHAR.

Examples¶

Convert strings in several different languages and character sets to lowercase:

SELECT v, LOWER(v) FROM lu;

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+----------------------------------+----------------------------------+
|                v                 |             lower(v)             |
+----------------------------------+----------------------------------+
|                                  |                                  |
| The Quick Gray Fox               | the quick gray fox               |
| LAUGHING ALL THE WAY             | laughing all the way             |
| OVER the River 2 Times           | over the river 2 times           |
| UuVvWwXxYyZz                     | uuvvwwxxyyzz                     |
| ÁáÄäÉéÍíÓóÔôÚúÝý                 | ááääééííóóôôúúýý                 |
| ÄäÖößÜü                          | ääöößüü                          |
| ÉéÀàÈèÙùÂâÊêÎîÔôÛûËëÏïÜüŸÿÇçŒœÆæ | ééààèèùùââêêîîôôûûëëïïüüÿÿççœœææ |
| ĄąĆćĘęŁłŃńÓóŚśŹźŻż               | ąąććęęłłńńóóśśźźżż               |
| ČčĎďĹĺĽľŇňŔŕŠšŤťŽž               | ččďďĺĺľľňňŕŕššťťžž               |
| АаБбВвГгДдЕеЁёЖжЗзИиЙй           | ааббввггддееёёжжззиийй           |
| КкЛлМмНнОоПпРрСсТтУуФф           | ккллммннооппррссттууфф           |
| ХхЦцЧчШшЩщЪъЫыЬьЭэЮюЯя           | ххццччшшщщъъыыььээююяя           |
| [NULL]                           | [NULL]                           |
+----------------------------------+----------------------------------+

LOWER supports collation specifications. This LOWER example specifies collation with the tr (Turkish) locale:

SELECT LOWER('I' COLLATE 'tr');

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+-------------------------+
| LOWER('I' COLLATE 'TR') |
|-------------------------|
| ı                       |
+-------------------------+