AmitDiwan has Published 10744 Articles

Set a custom value for NULL or empty values in MySQL

AmitDiwan

AmitDiwan

Updated on 30-Sep-2019 08:00:43

773 Views

Let us first create a table −mysql> create table DemoTable (    Value varchar(100) ); Query OK, 0 rows affected (0.75 sec)Insert some records in the table using insert command −mysql> insert into DemoTable values('100'); Query OK, 1 row affected (0.17 sec) mysql> insert into DemoTable values(''); Query OK, 1 ... Read More

Find the number of logins between two dates in MySQL

AmitDiwan

AmitDiwan

Updated on 30-Sep-2019 07:59:03

184 Views

Use BETWEEN to find the logins between two dates. Let us first create a table −mysql> create table DemoTable (    Login datetime ); Query OK, 0 rows affected (0.66 sec)Insert some records in the table using insert command −mysql> insert into DemoTable values('2019-08-10'); Query OK, 1 row affected (0.11 ... Read More

Display multiple selected rows using MySQL IN()

AmitDiwan

AmitDiwan

Updated on 30-Sep-2019 07:57:35

556 Views

Let us first create a table −mysql> create table DemoTable1045 (    Id int NOT NULL AUTO_INCREMENT PRIMARY KEY,    FirstName varchar(100) )AUTO_INCREMENT=100; Query OK, 0 rows affected (0.62 sec)Insert some records in the table using insert command −mysql> insert into DemoTable1045(FirstName) values('John'); Query OK, 1 row affected (0.15 sec) ... Read More

Advanced sorting in MySQL to display strings beginning with J at the end even after ORDER BY

AmitDiwan

AmitDiwan

Updated on 30-Sep-2019 07:55:12

144 Views

For this, use ORDER BY LIKE operator. Let us first create a table −mysql> create table DemoTable (    Name varchar(100) ); Query OK, 0 rows affected (0.60 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> ... Read More

Display all products having the highest amount in a MySQL table with product details?

AmitDiwan

AmitDiwan

Updated on 30-Sep-2019 07:53:23

465 Views

Use MAX() along with subquery for this Here, MAX() is used to get the maximum amount. Let us first create a table −mysql> create table DemoTable (    ProductId int NOT NULL AUTO_INCREMENT PRIMARY KEY,    ProductName varchar(100),    ProductAmount int ); Query OK, 0 rows affected (0.53 sec)Insert some ... Read More

How to compare the first date and the last date from a MySQL column with date records?

AmitDiwan

AmitDiwan

Updated on 30-Sep-2019 07:49:45

342 Views

To compare the first date with the last date, use TIME_TO_SEC() along with MAX() and MIN(). Let us first create a table −mysql> create table DemoTable (    UserName varchar(100),    UserPostDatetime datetime ); Query OK, 0 rows affected (0.65 sec)Insert some records in the table using insert command −mysql> ... Read More

How to get multiple rows in a single MySQL query?

AmitDiwan

AmitDiwan

Updated on 30-Sep-2019 07:48:08

772 Views

Let us first create a table −mysql> create table DemoTable (    Id int,    Name varchar(100) ); Query OK, 0 rows affected (0.60 sec)Insert some records in the table using insert command −mysql> insert into DemoTable values(100, 'Chris'); Query OK, 1 row affected (0.16 sec) mysql> insert into DemoTable ... Read More

Can we use WHERE clause inside MySQL CASE statement?

AmitDiwan

AmitDiwan

Updated on 30-Sep-2019 07:46:16

298 Views

For this, use the CASE WHEN statement. Let us first create a table −mysql> create table DemoTable1040 (    Value1 int,    Value2 int,    Value3 int ); Query OK, 0 rows affected (0.65 sec)Insert some records in the table using insert command −mysql> insert into DemoTable1040 values(10, 30, 1); ... Read More

How to get left substring in MySQL from a column with file path? Display the entire file path string excluding the file name?

AmitDiwan

AmitDiwan

Updated on 30-Sep-2019 07:39:52

375 Views

To get the left substring, use LEFT() along with substring_index(). For example, let’s say the file path is −“/MyFile/JavaProgram/Hello.java “Here, we will see how to display the entire file path except for the file name i.e. −/MyFile/JavaProgram/Let us first create a table −mysql> create table DemoTable (    FileLocation text ... Read More

How to get the fourth highest value using MySQL query?

AmitDiwan

AmitDiwan

Updated on 30-Sep-2019 07:30:53

330 Views

To get the fourth-highest value, use LIMIT OFFSET along with ORDER BY. Let us first create a table −mysql> create table DemoTable (    Amount int ); Query OK, 0 rows affected (0.88 sec)Insert some records in the table using insert command −mysql> insert into DemoTable values(980); Query OK, 1 ... Read More

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