Python MySql 从空字符串中选择

Question

I'm trying to select from a table so that the parameter I input can be nothing but it still will select everything

name = ""
mycursor.execute('SELECT * FROM table WHERE name LIKE "%%%s%%"' (name, ))

I was hoping to have if name is something like "", then everything in the table will be fetched.

Answer 1

With LIKE it will not be possible, however you can achieve it using REGEXP

name = "John Doe"
regexp='^.*$'
value = (regexp if name=="" else name)
query =  "SELECT * FROM mysql.user WHERE name REGEXP '{}' ;".format(value)
print(query)

Note: However be wary that if you are looking for a single user, and if there are other user names that matches the string Like "John Doe1" it will return both the entries