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MySQLi Articles
Page 208 of 341
What is the correct DateTime format for a MySQL Database?
The correct datetime format for MySQL database is as follows −‘YYYY-MM-DD HH:M:SS’Let us first create a table −mysql> create table DemoTable797 ( ArrivalDatetime datetime ); Query OK, 0 rows affected (0.68 sec)Insert some records in the table using insert command −mysql> insert into DemoTable797 values(NOW()); Query OK, 1 row affected (0.15 sec) mysql> insert into DemoTable797 values('2016-12-21 12:50:34'); Query OK, 1 row affected (0.17 sec) mysql> insert into DemoTable797 values('2017-03-01 17:40:21'); Query OK, 1 row affected (0.24 sec)Display all records from the table using select statement −mysql> select *from DemoTable797;This will produce the following output. We have ...
Read MoreHow to display the day name on the basis of Date of Birth records in MySQL?
Use the DAYNAME() to display the day name from records with Date of Birth.Let us first create a table −mysql> create table DemoTable795 ( DateOfBirth date ); Query OK, 0 rows affected (0.61 sec)Insert some records in the table using insert command −mysql> insert into DemoTable795 values('1996-01-21'); Query OK, 1 row affected (0.14 sec) mysql> insert into DemoTable795 values('2004-11-01'); Query OK, 1 row affected (0.12 sec) mysql> insert into DemoTable795 values('1990-03-31'); Query OK, 1 row affected (0.12 sec) mysql> insert into DemoTable795 values('2010-12-03'); Query OK, 1 row affected (0.13 sec)Display all records from the table using select ...
Read MoreWrite a single MySQL query to exclude a record and display NULL value
To check records which are NULL, use IS NULL. However, to exclude any of the records, use the NOT IN clause. Use both of them in the same query.Let us first create a table −mysql> create table DemoTable793 ( StudentId int NOT NULL AUTO_INCREMENT PRIMARY KEY, StudentName varchar(100) ); Query OK, 0 rows affected (0.81 sec)Insert some records in the table using insert command −mysql> insert into DemoTable793(StudentName) values('Adam'); Query OK, 1 row affected (0.14 sec) mysql> insert into DemoTable793(StudentName) values('Bob'); Query OK, 1 row affected (0.16 sec) mysql> insert into DemoTable793(StudentName) values(null); Query ...
Read MoreReshuffle the values in a table with MySQL
To reshuffle the values in a table, use MySQL RAND().Let us first create a table −mysql> create table DemoTable792 ( Name varchar(100), Subject varchar(100) ); Query OK, 0 rows affected (0.66 sec)Insert some records in the table using insert command −mysql> insert into DemoTable792 values('Chris', 'MySQL'); Query OK, 1 row affected (0.17 sec) mysql> insert into DemoTable792 values('David', 'MySQL'); Query OK, 1 row affected (0.22 sec) mysql> insert into DemoTable792 values('Robert', 'MongoDB'); Query OK, 1 row affected (0.20 sec) mysql> insert into DemoTable792 values('Carol', 'MongoDB'); Query OK, 1 row affected (0.18 sec)Display all records ...
Read MoreMySQL query to exclude some of the values from the table
Use NOT IN() to exclude some of the values from the table.Let us first create a table −mysql> create table DemoTable791 ( Id int NOT NULL AUTO_INCREMENT PRIMARY KEY, FirstName varchar(100) ); Query OK, 0 rows affected (0.61 sec)Insert some records in the table using insert command −mysql> insert into DemoTable791(FirstName) values('Chris'); Query OK, 1 row affected (0.16 sec) mysql> insert into DemoTable791(FirstName) values('Robert'); Query OK, 1 row affected (0.14 sec) mysql> insert into DemoTable791(FirstName) values('David'); Query OK, 1 row affected (0.14 sec) mysql> insert into DemoTable791(FirstName) values('Mike'); Query OK, 1 row affected (0.11 ...
Read MoreGet the highest score value from a single column and the greatest from two columns in MySQL
Let us first create a table −mysql> create table DemoTable790 ( Score1 int, Score2 int ); Query OK, 0 rows affected (0.45 sec)Insert some records in the table using insert command −mysql> insert into DemoTable790 values(98, 76); Query OK, 1 row affected (0.12 sec) mysql> insert into DemoTable790 values(78, 89); Query OK, 1 row affected (0.12 sec) mysql> insert into DemoTable790 values(85, 68); Query OK, 1 row affected (0.14 sec)Display all records from the table using select statement −mysql> select *from DemoTable790;This will produce the following output -+--------+--------+ | Score1 | Score2 | +--------+--------+ ...
Read MoreDisplay records where first and last name begins with the same letter in MySQL
To check for the 1st letter of the first and last name, you need to use the LEFT().Let us first create a table −mysql> create table DemoTable789 ( FirstName varchar(100), LastName varchar(100) ); Query OK, 0 rows affected (0.78 sec)Insert some records in the table using insert command −mysql> insert into DemoTable789 values('Adam', 'Smith'); Query OK, 1 row affected (0.12 sec) mysql> insert into DemoTable789 values('Tom', 'Taylor'); Query OK, 1 row affected (0.23 sec) mysql> insert into DemoTable789 values('Bob', 'Brown'); Query OK, 1 row affected (0.12 sec) mysql> insert into DemoTable789 values('David', 'Miller'); Query ...
Read MoreSort data for duplicate record in MySQL
Use ORDER BY to sort data for duplicate record.Let us first create a table −mysql> create table DemoTable788 ( FirstName varchar(100), Score int ); Query OK, 0 rows affected (1.89 sec)Insert some records in the table using insert command −mysql> insert into DemoTable788 values('Chris', 78); Query OK, 1 row affected (0.20 sec) mysql> insert into DemoTable788 values('Robert', 67); Query OK, 1 row affected (0.19 sec) mysql> insert into DemoTable788 values('Chris', 98); Query OK, 1 row affected (0.12 sec) mysql> insert into DemoTable788 values('Chris', 56); Query OK, 1 row affected (0.15 sec) mysql> insert into ...
Read MoreSelect a specific value between two column values in MySQL?
Let us first create a table −mysql> create table DemoTable787 ( Score1 int, Score2 int, Name varchar(100) ); Query OK, 0 rows affected (0.84 sec)Insert some records in the table using insert command −mysql> insert into DemoTable787 values(34, 56, 'Chris'); Query OK, 1 row affected (0.19 sec) mysql> insert into DemoTable787 values(73, 86, 'Robert'); Query OK, 1 row affected (0.19 sec) mysql> insert into DemoTable787 values(90, 99, 'David'); Query OK, 1 row affected (0.19 sec) mysql> insert into DemoTable787 values(80, 89, 'Adam'); Query OK, 1 row affected (0.21 sec)Display all records ...
Read MoreHow to display column values as CSV in MySQL?
To display column values as CSV, use GROUP_CONCAT().Let us first create a table −mysql> create table DemoTable786 ( StudentId int NOT NULL AUTO_INCREMENT PRIMARY KEY, StudentName varchar(100) ) AUTO_INCREMENT=101; Query OK, 0 rows affected (0.70 sec)Insert some records in the table using insert command −mysql> insert into DemoTable786(StudentName) values('Chris'); Query OK, 1 row affected (0.13 sec) mysql> insert into DemoTable786(StudentName) values('Robert'); Query OK, 1 row affected (0.24 sec) mysql> insert into DemoTable786(StudentName) values('Mike'); Query OK, 1 row affected (0.15 sec) mysql> insert into DemoTable786(StudentName) values('Sam'); Query OK, 1 row affected (0.12 sec)Display all records from the table ...
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