Deleting Earliest Incomplete or Brief Exam Records Using MySQL DELETE with ORDER BY and LIMIT
Consider an exam record table exam_record that logs user attempts over several year. The table has the folowing structure:
Field
Type
Null
Key
Extra
Default
Comment
id
int(11)
NO
PRI
auto_increment
(NULL)
Auto-increment ID
uid
int(11)
NO
(NULL)
User ID
exam_id
int(11)
NO
(NULL)
Exam ID
start_time
datetime
NO
(NULL)
Start time ...
Posted on Fri, 14 Aug 2026 16:06:04 +0000 by stonelord
Understanding the String.split Method in Java
The split method in Java is commonly used to divide strings based on a delimiter. The single-parameter version:
public String[] split(String regex) {
return split(regex, 0);
}
invokes an overloaded method with a default limit of 0. The underlying implementation:
public String[] split(String regex, int limit) {
String[] fast = Pattern.f ...
Posted on Sat, 09 May 2026 00:42:34 +0000 by ketola