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AmitDiwan has Published 11365 Articles
![AmitDiwan](https://www.tutorialspoint.com/assets/profiles/123055/profile/60_187394-1565938756.jpg)
AmitDiwan
356 Views
The CONCAT() method is used to concat, whereas GROUP_CONCAT() is used to concatenate strings from a group in a single string.Let us first create a table −mysql> create table DemoTable799 ( UserId int, UserName varchar(100), UserAge int ); Query OK, 0 ... Read More
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AmitDiwan
3K+ Views
Let’s see when the #1054 error occurs in MySQL. While inserting a varchar value, if you will forget to add single quotes, then this error will arise. Following is the error −mysql> insert into DemoTable798 values(100, Adam); ERROR 1054 (42S22): Unknown column 'Adam' in 'field list'You need to use single ... Read More
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AmitDiwan
175 Views
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, ... Read More
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AmitDiwan
862 Views
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'); ... Read More
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AmitDiwan
143 Views
To display number of fields in MySQL, use the COUNT(*). Following is the syntax −select COUNT(*) AS anyAliasName from INFORMATION_SCHEMA.COLUMNS where table_name = yourTableName AND TABLE_SCHEMA = yourDatabaseName;Let us first create a table −mysql> create table DemoTable794 ( ClientId int NOT NULL AUTO_INCREMENT PRIMARY KEY, ... Read More
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AmitDiwan
2K+ Views
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, ... Read More
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AmitDiwan
83 Views
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 ... Read More
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AmitDiwan
970 Views
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 ... Read More
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AmitDiwan
98 Views
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) ... Read More
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AmitDiwan
638 Views
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 ... Read More