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Database Articles
Page 429 of 547
How to add columns values with suffixed currency sign in MySQL
For this, you can use aggregate function SUM(). Let us first create a table:mysql> create table DemoTable616 (Price varchar(100)); Query OK, 0 rows affected (0.59 sec)Insert some records in the table using insert command −mysql> insert into DemoTable616 values('€200.00'); Query OK, 1 row affected (0.12 sec) mysql> insert into DemoTable616 values('€300.00'); Query OK, 1 row affected (0.18 sec) mysql> insert into DemoTable616 values('€500.00'); Query OK, 1 row affected (0.12 sec)Display all records from the table using select statement −mysql> select *from DemoTable616;This will produce the following output −+-----------+ | Price | +-----------+ | €200.00 | | ...
Read MoreDelete a specific record on the basis of EmployeeId in MySQL
Let us first create a table −mysql> create table DemoTable615 (EmployeeId varchar(100), EmployeeName varchar(100)); Query OK, 0 rows affected (0.62 sec)Insert some records in the table using insert command −mysql> insert into DemoTable615 values('EMP-101', 'Adam'); Query OK, 1 row affected (0.11 sec) mysql> insert into DemoTable615 values('EMP-1001', 'David'); Query OK, 1 row affected (0.20 sec) mysql> insert into DemoTable615 values('EMP-1002', 'Chris'); Query OK, 1 row affected (0.08 sec) mysql> insert into DemoTable615 values('EMP-1003', 'Robert'); Query OK, 1 row affected (0.21 sec)Display all records from the table using select statement −mysql> select *from DemoTable615;This will produce the following output −+------------+--------------+ | ...
Read MoreReturn similar names from different columns with distinct space allocations in MySQL?
For this, use LTRIM() and RTRIM(), since the names are similar but have different left and right space allocations. For example, “ John “ and “John”.Let us first create a table −mysql> create table DemoTable614 (EnterName varchar(100), ReennterName varchar(100)); Query OK, 0 rows affected (0.97 sec)Insert some records in the table using insert command −mysql> insert into DemoTable614 values(' John ', 'John'); Query OK, 1 row affected (0.19 sec) mysql> insert into DemoTable614 values('Carol ', 'Bob'); Query OK, 1 row affected (0.18 sec) mysql> insert into DemoTable614 values('David ', 'David'); Query OK, 1 row affected (0.23 sec)Display all records from ...
Read MorePerform MySQL update with AND operator
Let us first create a table −mysql> create table DemoTable613 (Id int, Age int, isMarried tinyint(1)); Query OK, 0 rows affected (0.54 sec)Insert some records in the table using insert command −mysql> insert into DemoTable613 values(100, 29, 0); Query OK, 1 row affected (0.17 sec) mysql> insert into DemoTable613 values(200, 22, 0); Query OK, 1 row affected (0.18 sec) mysql> insert into DemoTable613 values(300, 30, 1); Query OK, 1 row affected (0.19 sec)Display all records from the table using select statement −mysql> select *from DemoTable613;This will produce the following output −+------+------+-----------+ | Id | Age | isMarried | +------+------+-----------+ ...
Read MoreHow to create conditions in a MySQL table with multiple columns?
For conditions, use IF(). Following is the syntax −IF(yourCondition, trueStatement, falseStatement);Let us first create a table −mysql> create table DemoTable612 (Number1 int, Number2 int, Score int); Query OK, 0 rows affected (0.47 sec)Insert some records in the table using insert command −mysql> insert into DemoTable612 values(10, 20, 1000); Query OK, 1 row affected (0.12 sec) mysql> insert into DemoTable612 values(30, 40, 500); Query OK, 1 row affected (0.19 sec) mysql> insert into DemoTable612 values(50, 70, 1200); Query OK, 1 row affected (0.15 sec) mysql> insert into DemoTable612 values(100, 120, 400); Query OK, 1 row affected (0.16 sec)Display all records from ...
Read MoreSelecting the top occurring entries in MySQL from a table with duplicate values?
Let us first create a table −mysql> create table DemoTable610 (SubjectName varchar(100)); Query OK, 0 rows affected (0.63 sec)Insert some records in the table using insert command −mysql> insert into DemoTable610 values('MySQL'); Query OK, 1 row affected (0.18 sec) mysql> insert into DemoTable610 values('Java'); Query OK, 1 row affected (0.23 sec) mysql> insert into DemoTable610 values('MySQL'); Query OK, 1 row affected (0.13 sec) mysql> insert into DemoTable610 values('MongoDB'); Query OK, 1 row affected (0.14 sec) mysql> insert into DemoTable610 values('MySQL'); Query OK, 1 row affected (0.23 sec) mysql> insert into DemoTable610 values('MySQL'); Query OK, 1 row affected (0.08 sec) mysql> ...
Read MoreMySQL ORDER BY with EXPLAIN command
Let us first create a table −mysql> create table DemoTable606 (Id int NOT NULL AUTO_INCREMENT PRIMARY KEY, FirstName varchar(100)); Query OK, 0 rows affected (0.56 sec)Insert some records in the table using insert command −mysql> insert into DemoTable606(FirstName) values('John'); Query OK, 1 row affected (0.15 sec) mysql> insert into DemoTable606(FirstName) values('Robert'); Query OK, 1 row affected (0.14 sec) mysql> insert into DemoTable606(FirstName) values('Chris'); Query OK, 1 row affected (0.13 sec) mysql> insert into DemoTable606(FirstName) values('David'); Query OK, 1 row affected (0.13 sec)Display all records from the table using select statement −mysql> select *from DemoTable606;This will produce the following output −+----+-----------+ ...
Read MoreFormat date to display month names with the entire date in MySQL?
For this, you can use DATE_FORMAT(). Let us first create a table −mysql> create table DemoTable605 (DueDate date); Query OK, 0 rows affected (0.57 sec)Insert some records in the table using insert command −mysql> insert into DemoTable605 values('2019-01-21'); Query OK, 1 row affected (0.21 sec) mysql> insert into DemoTable605 values('2019-02-23'); Query OK, 1 row affected (0.11 sec) mysql> insert into DemoTable605 values(curdate()); Query OK, 1 row affected (0.15 sec)Display all records from the table using select statement −mysql> select *from DemoTable605;This will produce the following output −+------------+ | DueDate | +------------+ | 2019-01-21 | | 2019-02-23 | | 2019-03-04 ...
Read MoreMySQL Quoted table/field names vs unquoted names?
Any identifiers like tablename, stored procedure, viewname or column etc. may be quoted or unquoted. When an identifier is a reserved keyword then you must quote it, else an error would occur.Let us first create a table. Here, we have taken field names as reserved keywords −mysql> create table `INT` (`select` int, `varchar` varchar(100)); Query OK, 0 rows affected (0.50 sec)Insert some records in the table using insert command −mysql> insert into `INT` values(1, 'MySQL'); Query OK, 1 row affected (0.14 sec) mysql> insert into `INT` values(2, 'MongoDB'); Query OK, 1 row affected (0.34 sec) mysql> insert into `INT` values(3, ...
Read MoreRetrieve records whenever a column value starts with 2 vowel letters in MySQL
Let us first create a table −mysql> create table DemoTable664 (CityName varchar(100)); Query OK, 0 rows affected (0.89 sec)Insert some records in the table using insert command −mysql> insert into DemoTable664 values('Springfield'); Query OK, 1 row affected (0.15 sec) mysql> insert into DemoTable664 values('Austin'); Query OK, 1 row affected (0.30 sec) mysql> insert into DemoTable664 values('Franklin'); Query OK, 1 row affected (0.16 sec) mysql> insert into DemoTable664 values('OAKLAND'); Query OK, 1 row affected (0.11 sec) mysql> insert into DemoTable664 values('Anchorage'); Query OK, 1 row affected (0.18 sec)Display all records from the table using select statement −mysql> select *from DemoTable664;This will ...
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