MySQL uses foreign key constraint instead of inheritance. MySQL does not support table inheritance.You can achieve the same with the help of foreign key constraint. Let us create a table and use the foreign key constraint. The query to create the first table is as follows −mysql> create table Parent_Table ... Read More

You can use GLOBAL variable as shown below −SET global innodb_stats_on_metadata =0;After including the above syntax, the INFORMATION_SCHEMA.key_column_usage will take less time and that would improve the performance.The query is as follows −mysql> set global innodb_stats_on_metadata =0; Query OK, 0 rows affected (0.00 sec) mysql> SELECT REFERENCED_TABLE_NAME, TABLE_NAME, COLUMN_NAME, CONSTRAINT_SCHEMA ... Read More

The LocalTime instance can be obtained from a string value using the parse() method in the LocalTime class in Java. This method requires a single parameter i.e. the string which is to be parsed. This string cannot be null. Also, it returns the LocalTime instance obtained from the string value ... Read More

An immutable copy of a LocalTime where the required duration is subtracted from it can be obtained using the minus() method in the LocalTime class in Java. This method requires two parameters i.e. the duration to be subtracted and the TemporalUnit of the duration. Also, it returns the LocalTime object ... Read More

To implement AND condition, the syntax is as follows −select *from yourTableName where yourColumnName1 = yourValue1 AND yourColumnName2 = yourValue2;To understand the above syntax, let us create a table. The query to create a table is as follows −mysql> create table MySQLANDConditionDemo    -> (    -> Id int NOT ... Read More

The value to which a key is mapped can be obtained using the get() method in the class java.security.Provider. This method requires a single parameter i.e. the key whose value is required. It returns the value to which the key is mapped or it returns null if there is no ... Read More

An immutable copy of a LocalTime with the minutes altered as required is done using the method withMinute() in the LocalTime class in Java. This method requires a single parameter i.e. the minute that is to be set in the LocalTime and it returns the LocalTime with the minute altered ... Read More

Before getting into an example, we should know what LinkedBlockingDeque is. It is implemented by Collection interface and the AbstractQueue class. It provides optional boundaries based on linked nodes. It going to pass memory size to a constructor and helps to provide memory wastage in android.This example demonstrates about How ... Read More

Set implementations in Java has only unique elements. Therefore, it can be used to remove duplicate elements.Let us declare a list and add elements −List < Integer > list1 = new ArrayList < Integer > (); list1.add(100); list1.add(200); list1.add(300); list1.add(400); list1.add(400); list1.add(500); list1.add(600); list1.add(600); list1.add(700); list1.add(400); list1.add(500);Now, use the HashSet ... Read More

The name of the provider can be obtained using the getName() method in the class java.security.Provider. This method requires no parameter and it returns the name of the provider as required.A program that demonstrates this is given as follows −Example Live Demoimport java.security.*; import java.util.*; public class Demo {    public ... Read More