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Found 4378 Articles for MySQL
323 Views
To fix, you need to put MySQL connector to the Java classpath. Import the jar file of the connector to the project folder for the IDE you are using.Here is the snapshot to place classpath −Let us now see the code for connectivity in Java with MySQL −This will produce the following output −
294 Views
To replace only a single character, use REPLACE() in MySQL. Let us first create a table −mysql> create table DemoTable -> ( -> Name varchar(20) -> ); Query OK, 0 rows affected (0.69 sec)Insert some records in the table using insert command −mysql> insert into DemoTable values('John Smitk'); Query OK, 1 row affected (0.09 sec) mysql> insert into DemoTable values('David Miller'); Query OK, 1 row affected (0.14 sec) mysql> insert into DemoTable values('Adam Smitk'); Query OK, 1 row affected (0.11 sec)Display all records from the table using select statement −mysql> select *from DemoTable;This will produce the following ... Read More
52 Views
For this, you can use ORDER BY IFNULL(). Let us first create a table −mysql> create table DemoTable -> ( -> Name varchar(20), -> CountryName varchar(20) -> ); Query OK, 0 rows affected (0.61 sec)Insert some records in the table using insert command −mysql> insert into DemoTable values('Chris', NULL); Query OK, 1 row affected (0.19 sec) mysql> insert into DemoTable values('David', 'AUS'); Query OK, 1 row affected (0.14 sec) mysql> insert into DemoTable values(NULL, 'UK'); Query OK, 1 row affected (0.17 sec) mysql> insert into DemoTable values(NULL, 'AUS'); Query OK, 1 row affected (0.10 sec) mysql> ... Read More
1K+ Views
For this, you can use the UPDATE command along with the WHERE clause in a PROCEDURE. Let us first create a table −mysql> create table DemoTable -> ( -> Id int, -> FirstName varchar(20), -> LastName varchar(20) -> ); Query OK, 0 rows affected (0.56 sec)Insert some records in the table using insert command −mysql> insert into DemoTable values(101, 'David', 'Brown'); Query OK, 1 row affected (0.15 sec) mysql> insert into DemoTable values(102, 'Chris', 'Brown'); Query OK, 1 row affected (0.08 sec) mysql> insert into DemoTable values(103, 'John', 'Doe'); Query OK, 1 row affected (0.07 ... Read More
210 Views
If we will insert nothing in the INSERT statement, then for timestamp type, it would insert the current date-time. Let us first create a table −mysql> create table DemoTable -> ( -> UserId int NOT NULL AUTO_INCREMENT PRIMARY KEY, -> UserLoginDate timestamp default current_timestamp -> ); Query OK, 0 rows affected (0.61 sec)Insert some records in the table using insert command −mysql> insert into DemoTable values(); Query OK, 1 row affected (0.15 sec) mysql> insert into DemoTable values(); Query OK, 1 row affected (0.10 sec) mysql> insert into DemoTable values(); Query OK, 1 row affected (0.08 ... Read More
108 Views
Let us first create a table −mysql> create table DemoTable -> ( -> Value varchar(20) -> ); Query OK, 0 rows affected (0.53 sec)Insert some records in the table using insert command −mysql> insert into DemoTable values('20'); Query OK, 1 row affected (0.14 sec) mysql> insert into DemoTable values('10.5'); Query OK, 1 row affected (0.19 sec) mysql> insert into DemoTable values('11'); Query OK, 1 row affected (0.13 sec) mysql> insert into DemoTable values('10'); Query OK, 1 row affected (0.11 sec) mysql> insert into DemoTable values('20.5'); Query OK, 1 row affected (0.13 sec)Display all records from the table ... Read More
188 Views
Use the STR_TO_DATE() method to insert date records as in the below syntax −select str_to_date(yourColumnName, '%b %Y') from yourTableName;Let us first create a table −mysql> create table DemoTable -> ( -> JoiningYear varchar(20) -> ); Query OK, 0 rows affected (0.69 sec)Insert some records in the table using insert command −mysql> insert into DemoTable values('Jan 2018'); Query OK, 1 row affected (0.12 sec) mysql> insert into DemoTable values('May 2107'); Query OK, 1 row affected (0.32 sec) mysql> insert into DemoTable values('Aug 2019'); Query OK, 1 row affected (0.12 sec) mysql> insert into DemoTable values('Oct 2020'); Query OK, ... Read More
76 Views
Let us first create a table −mysql> create table DemoTable -> ( -> Version varchar(20) -> ); Query OK, 0 rows affected (0.77 sec)Insert some records in the table using insert command −mysql> insert into DemoTable values('1.0.0'); Query OK, 1 row affected (0.21 sec) mysql> insert into DemoTable values('2.s6.9'); Query OK, 1 row affected (0.16 sec) mysql> insert into DemoTable values('1.5.0'); Query OK, 1 row affected (0.12 sec)Display all records from the table using select statement −mysql> select *from DemoTable;This will produce the following output −+---------+ | Version | +---------+ | 1.0.0 | | 2.s6.9 | ... Read More
190 Views
Use FORMAT() in MySQL to display currency records and display them in the correct form. Let us first create a table −mysql> create table DemoTable -> ( -> Amount DECIMAL(15, 4) -> ); Query OK, 0 rows affected (0.75 sec)Insert some records in the table using insert command −mysql> insert into DemoTable values(90948484); Query OK, 1 row affected (0.13 sec) mysql> insert into DemoTable values(1000000000); Query OK, 1 row affected (0.17 sec) mysql> insert into DemoTable values(1535353536); Query OK, 1 row affected (0.09 sec) mysql> insert into DemoTable values(773646463); Query OK, 1 row affected (0.20 sec)Display all ... Read More
54 Views
For this, use LEFT in MySQL. Let us first create a table −mysql> create table DemoTable -> ( -> Title text -> ); Query OK, 0 rows affected (0.59 sec)Insert some records in the table using insert command −mysql> insert into DemoTable values('Java database connectivity to MySQL database'); Query OK, 1 row affected (0.12 sec) mysql> insert into DemoTable values('Python with django framework'); Query OK, 1 row affected (0.11 sec) mysql> insert into DemoTable values('C with data structure and algorithm'); Query OK, 1 row affected (0.33 sec)Display all records from the table using select statement −mysql> select ... Read More