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MySQLi Articles
Page 181 of 341
How to sum varchar column and display the count in MySQL?
For this, use GROUP BY along with COUNT(*). Let us first create a table −mysql> create table DemoTable ( EmployeeId int NOT NULL AUTO_INCREMENT PRIMARY KEY, EmployeeGender varchar(40) ); Query OK, 0 rows affected (0.48 sec)Insert some records in the table using insert command −mysql> insert into DemoTable(EmployeeGender) values('MALE'); Query OK, 1 row affected (0.15 sec) mysql> insert into DemoTable(EmployeeGender) values('FEMALE'); Query OK, 1 row affected (0.09 sec) mysql> insert into DemoTable(EmployeeGender) values('FEMALE'); Query OK, 1 row affected (0.07 sec) mysql> insert into DemoTable(EmployeeGender) values('FEMALE'); Query OK, 1 row affected (0.09 sec) mysql> insert into DemoTable(EmployeeGender) values('MALE'); Query ...
Read MoreFormat date with DATE_FORMAT() and STR_TO_DATE() in MySQL
Let us first create a table −mysql> create table DemoTable ( DueDate varchar(100) ); Query OK, 0 rows affected (0.62 sec)Insert some records in the table using insert command −mysql> insert into DemoTable values('August 04, 2019'); Query OK, 1 row affected (0.25 sec)Display all records from the table using select statement −mysql> select *from DemoTable;This will produce the following output −+----------------+ | DueDate | +----------------+ | August 04, 2019 | +----------------+ 1 row in set (0.00 sec)Following is the query to format date −mysql> set @stringToDate=(select date_format(str_to_date(DueDate, '%M %d, %Y'), '%Y-%m-%d') from ...
Read MoreTo return value of a number raised to the power of another number, we should use ^ operator in MySQL?
No, ^ is the Bitwise XOR operator in MySQL. For this, use POW() or POWER() from MySQL. Let us first create a table &minuns;mysql> create table DemoTable ( BaseValue int, PowerValue float ); Query OK, 0 rows affected (0.48 sec)Insert some records in the table using insert command −mysql> insert into DemoTable values(4, 1.9867); Query OK, 1 row affected (0.14 sec) mysql> insert into DemoTable values(10, 6.789); Query OK, 1 row affected (0.13 sec) mysql> insert into DemoTable values(20, 8.9); Query OK, 1 row affected (0.14 sec)Display all records from the table using select statement −mysql> select *from ...
Read MoreHow to display records having sum between a specific range using GROUP BY, HAVING and ORDER BY in a single MySQL query?
Let us first create a table −mysql> create table DemoTable ( Id int NOT NULL AUTO_INCREMENT PRIMARY KEY, CustomerName varchar(20), ProductPrice int ); Query OK, 0 rows affected (0.70 sec)Insert some records in the table using insert command −mysql> insert into DemoTable(CustomerName, ProductPrice) values('Chris', 600); Query OK, 1 row affected (0.18 sec) mysql> insert into DemoTable(CustomerName, ProductPrice) values('David', 450); Query OK, 1 row affected (0.09 sec) mysql> insert into DemoTable(CustomerName, ProductPrice) values('Chris', 980); Query OK, 1 row affected (0.40 sec) mysql> insert into DemoTable(CustomerName, ProductPrice) values('Mike', 1200); Query OK, 1 row affected (0.11 sec) mysql> insert into ...
Read MoreDisplay duplicate record as a distinct value with corresponding values as distinct comma separated list in MySQL?
For this, you can use GROUP_CONCAT(). You also need to use DISTINCT to fetch distinct records. Let us first create a table −mysql> create table DemoTable( Id int NOT NULL AUTO_INCREMENT PRIMARY KEY, Name varchar(40), Score int ); Query OK, 0 rows affected (0.53 sec)Insert some records in the table using insert command −mysql> insert into DemoTable(Name, Score) values('Chris', 56); Query OK, 1 row affected (0.21 sec) mysql> insert into DemoTable(Name, Score) values('Robert', 78); Query OK, 1 row affected (0.17 sec) mysql> insert into DemoTable(Name, Score) values('Chris', 56); Query OK, 1 row affected (0.42 sec) mysql> insert ...
Read MoreHow to sum selected column values based on specific month records in MySQL?
Let us first create a table −mysql> create table DemoTable ( Id int NOT NULL AUTO_INCREMENT PRIMARY KEY, PurchaseDate date, SalePrice int ); Query OK, 0 rows affected (0.51 sec)Insert some records in the table using insert command −mysql> insert into DemoTable(PurchaseDate, SalePrice) values('2018-01-10', 450); Query OK, 1 row affected (0.12 sec) mysql> insert into DemoTable(PurchaseDate, SalePrice) values('2019-12-25', 1000); Query OK, 1 row affected (0.18 sec) mysql> insert into DemoTable(PurchaseDate, SalePrice) values('2016-12-02', 5560); Query OK, 1 row affected (0.07 sec) mysql> insert into DemoTable(PurchaseDate, SalePrice) values('2015-02-20', 4550); Query OK, 1 row affected (0.18 sec) mysql> insert into ...
Read MoreDoes UPDATE overwrite values if they are identical in MySQL
No, MySQL UPDATE won’t overwrite values if they are identical. Let us first create a table −mysql> create table DemoTable ( StudentId int, StudentMathMarks int, StudentMySQLMarks int ); Query OK, 0 rows affected (0.46 sec)Insert some records in the table using insert command −mysql> insert into DemoTable values(1, 56, 78); Query OK, 1 row affected (0.21 sec) mysql> insert into DemoTable values(2, 88, 99); Query OK, 1 row affected (0.15 sec) mysql> inse rt into DemoTable values(3, 34, 98); Query OK, 1 row affected (0.13 sec)Display all records from the table using select statement −mysql> select *from ...
Read MoreCount from two tables and give combined count of string in MySQL?
To count, use the MySQL COUNT(*). However, with UNION ALL you would be able to get a combined count of string. Let us first create a table −mysql> create table DemoTable1 ( Name varchar(20) ); Query OK, 0 rows affected (0.49 sec)Insert some records in the table using insert command. We are inserting string values in the first table −mysql> insert into DemoTable1 values('Chris'); Query OK, 1 row affected (0.14 sec) mysql> insert into DemoTable1 values('Robert'); Query OK, 1 row affected (0.12 sec) mysql> insert into DemoTable1 values('Mike'); Query OK, 1 row affected (0.13 sec) mysql> insert into DemoTable1 ...
Read MoreHow to execute multiple select queries in MySQL ?
To execute multiple select queries in MySQL, use the concept of DELIMITER. Let us first create a table −mysql> create table DemoTable1 ( Title text )ENGINE=MyISAM; Query OK, 0 rows affected (0.30 sec)Insert some records in the table using insert command −mysql> insert into DemoTable1 values('The database MySQL is less popular than MongoDB') ; Query OK, 1 row affected (0.09 sec) mysql> insert into DemoTable1 values('Java language uses MySQL database'); Query OK, 1 row affected (0.05 sec) mysql> insert into DemoTable1 values('Node.js uses the MongoDB') ; Query OK, 1 row affected (0.05 sec)Display all records from the table using ...
Read MoreWhy the following is showing an error in MySQL: INSERT INTO yourTableName VALUE(yourValue1,yourValue2,.......N);?
The error is in the syntax of VALUE().Use VALUES() instead of VALUE(). The correct syntax of the insert query is as follows −INSERT INTO yourTableName VALUES(yourValue1, yourValue2, .......N);Let us first create a table −mysql> create table DemoTable ( StudentId int, StudentName varchar(40), StudentAge int ); Query OK, 0 rows affected (0.48 sec)Insert some records in the table using insert command −mysql> INSERT INTO DemoTable VALUES(1001, 'Tom', 20); Query OK, 1 row affected (0.11 sec) mysql> INSERT INTO DemoTable VALUES(1002, 'Mike', 21); Query OK, 1 row affected (0.13 sec) mysql> INSERT INTO DemoTable VALUES(1003, 'Sam', 19); Query OK, ...
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