sql 字符串函数（一）


WITH example AS(SELECT "абвгд" AS characters, b"абвгд" AS bytes)SELECTcharacters,BYTE_LENGTH(characters) AS string_example,bytes,BYTE_LENGTH(bytes) AS bytes_example
FROM example;+------------+----------------+-------+---------------+
| characters | string_example | bytes | bytes_example |
+------------+----------------+-------+---------------+
| абвгд      | 10             | абвгд | 10            |
+------------+----------------+-------+---------------+


WITH example AS(SELECT "абвгд" AS characters)SELECTcharacters,CHAR_LENGTH(characters) AS char_length_example
FROM example;+------------+---------------------+
| characters | char_length_example |
+------------+---------------------+
| абвгд      |                   5 |
+------------+---------------------+

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