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MySQLi Articles
Page 153 of 341
Finding the average and display the maximum average of duplicate ids?
For this, use AVG(). To find the maximum average value, use MAX() and group by id. Let us first create a table −mysql> create table DemoTable -> ( -> PlayerId int, -> PlayerScore int -> ); Query OK, 0 rows affected (0.55 sec)Insert some records in the table using insert command −mysql> insert into DemoTable values(1, 78); Query OK, 1 row affected (0.16 sec) mysql> insert into DemoTable values(2, 82); Query OK, 1 row affected (0.25 sec) mysql> insert into DemoTable values(1, 45); Query OK, 1 row affected (0.17 sec) mysql> insert into DemoTable values(3, 97); ...
Read MoreUsing GROUP BY and COUNT in a single MySQL query to group duplicate records and display corresponding max value
Let us first create a table −mysql> create table DemoTable -> ( -> ClientId int, -> Value int -> ); Query OK, 0 rows affected (0.79 sec)Insert some records in the table using insert command −mysql> insert into DemoTable values(10, 678); Query OK, 1 row affected (0.15 sec) mysql> insert into DemoTable values(20, 678); Query OK, 1 row affected (0.12 sec) mysql> insert into DemoTable values(30, 678); Query OK, 1 row affected (0.09 sec)Display all records from the table using select statement −mysql> select *from DemoTable;This will produce the following output −+----------+-------+ | ClientId | Value ...
Read MoreFetching multiple MySQL rows based on a specific input within one of the table columns?
Let us first create a table −mysql> create table DemoTable1528 -> ( -> StudentId int NOT NULL AUTO_INCREMENT PRIMARY KEY, -> StudentName varchar(20), -> StudentSubject varchar(20) -> ); Query OK, 0 rows affected (0.53 sec)Insert some records in the table using insert command −mysql> insert into DemoTable1528(StudentName, StudentSubject) values('Chris', 'MongoDB'); Query OK, 1 row affected (0.38 sec) mysql> insert into DemoTable1528(StudentName, StudentSubject) values('Bob', 'MySQL'); Query OK, 1 row affected (0.10 sec) mysql> insert into DemoTable1528(StudentName, StudentSubject) values('David', 'Java'); Query OK, 1 row affected (0.11 sec) mysql> insert into DemoTable1528(StudentName, StudentSubject) values('Carol', 'C'); Query OK, 1 ...
Read MoreHow to insert records with double quotes in MySQL?
To insert records with double quotes, use the backslash (\) as in the below syntax −Syntaxinsert into yourTableName values('"yourValue"');Let us first create a table −mysql> create table DemoTable -> ( -> Name varchar(20) -> ); Query OK, 0 rows affected (0.63 sec)Insert some records in the table using insert command −mysql> insert into DemoTable values('"John"'); Query OK, 1 row affected (0.17 sec) mysql> insert into DemoTable values('"Chris"'); Query OK, 1 row affected (0.11 sec) mysql> insert into DemoTable values('"Adam Smith"'); Query OK, 1 row affected (0.14 sec) mysql> insert into DemoTable values('"Carol"'); Query OK, 1 row affected ...
Read MoreHow to display only hour and minutes in MySQL?
To display only hour and minutes, use DATE_FORMAT() and set format specifiers as in the below syntax −select date_format(yourColumnName, '%H:%i') as anyAliasName from yourTableName;Let us first create a table −mysql> create table DemoTable1527 -> ( -> ArrivalDatetime datetime -> ); Query OK, 0 rows affected (0.76 sec)Insert some records in the table using insert command −mysql> insert into DemoTable1527 values('2019-01-10 12:34:45'); Query OK, 1 row affected (0.18 sec) mysql> insert into DemoTable1527 values('2018-12-12 11:00:34'); Query OK, 1 row affected (0.13 sec) mysql> insert into DemoTable1527 values('2019-03-21 04:55:56'); Query OK, 1 row affected (0.18 sec)Display all records from ...
Read MoreOrder by last 3 months first, then alphabetically in MySQL?
Let us first create a table −mysql> create table DemoTable1526 -> ( -> CustomerName varchar(20), -> PurchaseDate date -> ); Query OK, 0 rows affected (0.67 sec)Insert some records in the table using insert command. Here, we have inserted 2019 dates −mysql> insert into DemoTable1526 values('Adam', '2019-06-01'); Query OK, 1 row affected (0.12 sec) mysql> insert into DemoTable1526 values('Sam', '2019-04-26'); Query OK, 1 row affected (0.13 sec) mysql> insert into DemoTable1526 values('Chris', '2019-05-24'); Query OK, 1 row affected (0.10 sec) mysql> insert into DemoTable1526 values('David', '2019-10-10'); Query OK, 1 row affected (0.23 sec) mysql> insert into ...
Read MoreSelect date from MySQL and format to text?
To select date and format, use SELECT DATE_FORMAT(). Following is the syntax −Syntaxselect date_format(yourColumnName, '%e %b %y') from yourTableName;Let us first create a table −mysql> create table DemoTable -> ( -> DueDate date -> ); Query OK, 0 rows affected (0.52 sec)Insert some records in the table using insert command −mysql> insert into DemoTable values('2019-01-11'); Query OK, 1 row affected (0.19 sec) mysql> insert into DemoTable values('2019-12-21'); Query OK, 1 row affected (0.13 sec) mysql> insert into DemoTable values('2019-09-15'); Query OK, 1 row affected (0.07 sec)Display all records from the table using select statement −mysql> select *from ...
Read MoreGroup MySQL rows in an array by column value?
To group rows in an array, use GROUP_CONCAT() along with the ORDER BY clause. Let us first create a table −mysql> create table DemoTable -> ( -> Id int, -> FirstName varchar(20) -> ); Query OK, 0 rows affected (0.78 sec)Insert some records in the table using insert command −mysql> insert into DemoTable values(101, 'John'); Query OK, 1 row affected (0.13 sec) mysql> insert into DemoTable values(102, 'Bob'); Query OK, 1 row affected (0.18 sec) mysql> insert into DemoTable values(101, 'David'); Query OK, 1 row affected (0.12 sec) mysql> insert into DemoTable values(101, 'Adam'); Query OK, ...
Read MoreGetting last value in MySQL group concat?
To get last value in group concat, use SUBSTRING_INDEX(). Let us first create a table −mysql> create table DemoTable1525 -> ( -> ListOfSubjects text -> ); Query OK, 0 rows affected (1.13 sec)Insert some records in the table using insert command −mysql> insert into DemoTable1525 values('MongoDB, C'); Query OK, 1 row affected (0.15 sec) mysql> insert into DemoTable1525 values('Java, C++, MySQL'); Query OK, 1 row affected (0.25 sec) mysql> insert into DemoTable1525 values('Python, C++, C, Java'); Query OK, 1 row affected (0.14 sec)Display all records from the table using select statement −mysql> select * from DemoTable1525;This will ...
Read MoreMatch the elements of an array in a MySQL query
Let us first create a table table −mysql> create table DemoTable1523 -> ( -> Id int, -> Value int -> ); Query OK, 0 rows affected (0.76 sec)Insert some records in the table using insert command −mysql> insert into DemoTable1523 values(1, 56); Query OK, 1 row affected (0.15 sec) mysql> insert into DemoTable1523 values(2, 78); Query OK, 1 row affected (0.15 sec) mysql> insert into DemoTable1523 values(1, 34); Query OK, 1 row affected (0.10 sec) mysql> insert into DemoTable1523 values(2, 45); Query OK, 1 row affected (0.17 sec) mysql> insert into DemoTable1523 values(1, 99); Query OK, ...
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