Create a table test (id blob);
select count(*)as to _ char from test；
MySQL:
Is a relational database management system developed by MySQL in Sweden.
ab blood type
Company development, currently belongs to Oracle Bone Inscriptions products. relational database
The most popular relational database management system
net
MySQL is the best in application.
Relational database management system
(relationship
Database database
manage
System, relational database management system)
One of the application software.
String:
Mainly used for programming. See the text for concept description, function explanation and usage details. Here, it is added that a string is similar to a character array in storage, so a single element of each bit can be extracted, which can provide us with a lot of convenience. For example, each bit can be converted into a number and stored in a high-precision operation.
Array.