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You will get this type of exception whenever your JDBC URL is not accepted by any of the loaded JDBC drivers by the method acceptsURL. You need to mention the MySQL JDBC driver which is as follows −The MySQL JDBC url is as follows −jdbc:mysql://localhost:3306/test?useSSL=falseThe prototype of acceptsURL is as follows −boolean acceptsURL(String url) throws SQLExceptionThe acceptsURL returns boolean that means if the JDBC driver understands the database URL it returns true otherwise false. It takes one parameter of type String which is a database URL.The entire database URL connection is as follows. The syntax −con = DriverManager. getConnection("jdbc:mysql://localhost:3306/yourDatabaseName?useSSL=false", "yourUserName", ... Read More
To get the character length, use the CHAR_LENGTH() method. Let us first create a table −mysql> create table DemoTable -> ( -> Name varchar(100) -> ); Query OK, 0 rows affected (1.04 sec)Insert some records in the table using insert command −mysql> insert into DemoTable values('John'); Query OK, 1 row affected (0.13 sec) mysql> insert into DemoTable values('Robert'); Query OK, 1 row affected (0.14 sec) mysql> insert into DemoTable values('Bob'); Query OK, 1 row affected (0.20 sec) mysql> insert into DemoTable values('David'); Query OK, 1 row affected (0.15 sec)Display all records from the table ... Read More
Before getting into example, we should know what ConcurrentLinkedDequeis, it is unbounded deque based on linked nodes. Multiple threads can access deque elements with safety.This example demonstrate about How to add last element in android ConcurrentLinkedDequeStep 1 − Create a new project in Android Studio, go to File ⇒ New Project and fill all required details to create a new project.Step 2 − Add the following code to res/layout/activity_main.xml. In the above code, we have taken text view to showConcurrentLinkedDequeelements.Step 3 − Add the following code to src/MainActivity.javapackage com.example.myapplication; import android.os.Build; import android.os.Bundle; import android.support.annotation.RequiresApi; import ... Read More
To insert a record in the table using PreparedStatement in Java, you need to use below syntax to insert records. The syntax is as follows −String anyVariableName= "INSERT INTO yourTableName(yourColumnName1, yourColumnName2, yourColumnName3, .........N)" + "VALUES (?, ?, ?, ..............N)";Now use the PreparedStatement object to set the value for all columns. The syntax is as follows −PreparedstatementObject = con.prepareStatement(query); PreparedstatementObject .setXXX(1, yourValue); PreparedstatementObject .setXXX(2, yourValue); PreparedstatementObject .setXXX(3, yourValue); . . . NThe above prepared statement will solve your problem. Now first create a table in MySQL. The query to create a table is as follows −mysql> create table CourseDemo -> ( ... Read More
Before getting into example, we should know what ConcurrentLinkedDequeis, it is unbounded deque based on linked nodes. Multiple threads can access deque elements with safety.This example demonstrate about How to add first element in android ConcurrentLinkedDequeStep 1 − Create a new project in Android Studio, go to File ⇒ New Project and fill all required details to create a new project.Step 2 − Add the following code to res/layout/activity_main.xml. In the above code, we have taken text view to showConcurrentLinkedDequeelements.Step 3 − Add the following code to src/MainActivity.javapackage com.example.myapplication; import android.os.Build; import android.os.Bundle; import android.support.annotation.RequiresApi; import ... Read More
Let us first create a table −mysql> create table DemoTable -> ( -> EmployeeName varchar(100) -> ); Query OK, 0 rows affected (0.81 sec)Insert some records in the table using insert command −mysql> insert into DemoTable values('Adam Smith'); Query OK, 1 row affected (0.12 sec) mysql> insert into DemoTable values('Carol Taylor'); Query OK, 1 row affected (0.12 sec) mysql> insert into DemoTable values('David Miller'); Query OK, 1 row affected (0.20 sec) mysql> insert into DemoTable values('Chris Evan'); Query OK, 1 row affected (0.13 sec)Display all records from the table using select statement −mysql> select ... Read More
Before getting into example, we should know what CopyOnWriteArrayListis. It is a thread-safe variant of ArrayListand operations add, set, and so on by making a fresh copy of the underlying array.This example demonstrate about How to add element based on index in android CopyOnWriteArrayListStep 1 − Create a new project in Android Studio, go to File ⇒ New Project and fill all required details to create a new project.Step 2 − Add the following code to res/layout/activity_main.xml. In the above code, we have taken text view to showCopyOnWriteArrayListelements.Step 3 − Add the following code to src/MainActivity.javapackage ... Read More
To create a temporary table in a MySQL procedure, following is the syntax −CREATE PROCEDURE yourProcedureName() BEGIN CREATE TEMPORARY TABLE yourTemporaryTableName SELECT yourValue; ENDLet us implement the above syntax to create a temporary table and insert some records in the table. Following is the query to create a stored procedure and a temporary table in it −mysql> DELIMITER // mysql> CREATE PROCEDURE create_Temporary_Table() -> BEGIN -> CREATE TEMPORARY TABLE tmpDemoTable SELECT 500; -> END// Query OK, 0 rows affected (0.15 sec)Following is the query to insert record in the table −mysql> ... Read More
You can use below syntax. Following is the syntax −update yourTableName set yourColumnName=REVERSE(SUBSTRING(REVERSE(yourColumnName), INSTR(REVERSE(yourColumnName), '.')));Let us first create a table −mysql> create table DemoTable -> ( -> Words text -> ); Query OK, 0 rows affected (0.51 sec)Insert some records in the table using insert command −mysql> insert into DemoTable values('Value1. Value2 .Value3.Value4.Value5'); Query OK, 1 row affected (0.22 sec)Display all records from the table using select statement −mysql> select *from DemoTable;OutputThis will produce the following output −+--------------------------------------+ | Words ... Read More
To find the minimum values of two or more fields, use LEAST() function from MySQL −select least(yourColumnName1, yourColumnName2, ...N) from yourTableName;Let us first create a table −mysql> create table DemoTable -> ( -> Date1 date, -> Date2 date, -> Date3 date -> ); Query OK, 0 rows affected (0.54 sec)Insert some records in the table using insert command −mysql> insert into DemoTable values('2019-03-31', '2019-01-01', '2019-03-05'); Query OK, 1 row affected (0.17 sec)Display all records from the table using select statement −mysql> select *from DemoTable;OutputThis will produce the following output −+------------+------------+------------+ | Date1 | Date2 | Date3 ... Read More