Can the length of varchar in mysql not be set?

No, the VARCHAR data type in MySQL must specify a length to define its maximum number of characters. If the length is not specified, MySQL will throw an error.

Can VARCHAR in MySQL not have a length set?

Answer: No

Detailed explanation:

The VARCHAR data type must specify the length in MySQL. Defines the maximum number of characters that this data type can hold. If you do not specify a length, MySQL will throw an error:

<code>ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'varchar' at line 1</code>

VARCHAR Length is critical for optimizing performance and storage space. If an inappropriate length is specified, it may result in data truncation or unnecessary memory consumption.

Therefore, when defining the VARCHAR data type, it is always recommended to specify an appropriate length. The length should be based on the maximum expected length of the data value being stored.

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