Article Categories
- All Categories
-
Data Structure
-
Networking
-
RDBMS
-
Operating System
-
Java
-
MS Excel
-
iOS
-
HTML
-
CSS
-
Android
-
Python
-
C Programming
-
C++
-
C#
-
MongoDB
-
MySQL
-
Javascript
-
PHP
-
Economics & Finance
Articles by AmitDiwan
Page 793 of 840
Delete last value and fix two new values (VARCHAR Numbers) in MySQL declared as VARCHAR?
Let us first create a table. Here, we have VARCHAR type for value −mysql> create table DemoTable ( Value varchar(100) ); Query OK, 0 rows affected (1.80 sec)Insert some records in the table using insert command −mysql> insert into DemoTable values('100'); Query OK, 1 row affected (0.20 sec) mysql> insert into DemoTable values('1244'); Query OK, 1 row affected (0.16 sec) mysql> insert into DemoTable values('15789'); Query OK, 1 row affected (0.18 sec)Display all records from the table using select statement −mysql> select *from DemoTable;This will produce the following output −+-------+ | Value | +-------+ | 100 | ...
Read MoreMySQL query to fetch date records greater than the current date after adding days with INTERVAL?
Let us first create a table −mysql> create table DemoTable ( Id int NOT NULL AUTO_INCREMENT PRIMARY KEY, AddDay int, PostDate date ); Query OK, 0 rows affected (2.73 sec)Insert some records in the table using insert command −mysql> insert into DemoTable(AddDay, PostDate) values(20, '2019-08-04'); Query OK, 1 row affected (0.11 sec) mysql> insert into DemoTable(AddDay, PostDate) values(7, '2019-08-20'); Query OK, 1 row affected (0.16 sec) mysql> insert into DemoTable(AddDay, PostDate) values(45, '2019-07-01'); Query OK, 1 row affected (0.19 sec)Display all records from the table using select statement −mysql> select *from DemoTable;This will produce the following output ...
Read MoreAdd a new column to table and fill it with the data of two other columns of the same table in MySQL?
Let us first create a table −mysql> create table DemoTable ( Price int, Quantity int ); Query OK, 0 rows affected (0.71 sec)Insert some records in the table using insert command −mysql> insert into DemoTable values(45, 3); Query OK, 1 row affected (0.15 sec) mysql> insert into DemoTable values(90, 2); Query OK, 1 row affected (0.16 sec) mysql> insert into DemoTable values(440, 1); 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 −+-------+----------+ | Price | Quantity | +-------+----------+ | ...
Read MoreCreate a temporary table similar to a regular table with MySQL LIKE
Let us first create a table −mysql> create table DemoTable1 ( Id int NOT NULL AUTO_INCREMENT PRIMARY KEY, Name varchar(100) ); Query OK, 0 rows affected (0.59 sec)Insert some records in the table using insert command −mysql> insert into DemoTable1(Name) values('Chris'); Query OK, 1 row affected (0.10 sec) mysql> insert into DemoTable1(Name) values('Robert'); Query OK, 1 row affected (0.19 sec) mysql> insert into DemoTable1(Name) values('Mike'); Query OK, 1 row affected (0.15 sec) mysql> insert into DemoTable1(Name) values('Sam'); Query OK, 1 row affected (0.07 sec)Display all records from the table using select statement −mysql> select *from DemoTable1;This will produce ...
Read MoreDisplay record with today and tomorrow's date from a column with date record in MySQL
Let us first create a table −mysql> create table DemoTable ( AdmissionDate date ); Query OK, 0 rows affected (0.87 sec)Insert some records in the table using insert command −mysql> insert into DemoTable values('2019-08-24'); Query OK, 1 row affected (0.11 sec) mysql> insert into DemoTable values('2019-08-25'); Query OK, 1 row affected (0.10 sec) mysql> insert into DemoTable values('2019-08-20'); Query OK, 1 row affected (0.24 sec)Display all records from the table using select statement −mysql> select *from DemoTable;This will produce the following output −+---------------+ | AdmissionDate | +---------------+ | 2019-08-24 | | 2019-08-25 | ...
Read MoreHow do I sort numbers saved as VARCHAR in MySQL with some of them having preceding 0 like 085, 090, etc.?
Following is the syntax −select *from yourTableName order by yourColumnName*1, yourColumnName;Let us first create a table −mysql> create table DemoTable ( Value varchar(100) ); Query OK, 0 rows affected (0.62 sec)Insert some records in the table using insert command −mysql> insert into DemoTable values('90'); Query OK, 1 row affected (0.20 sec) mysql> insert into DemoTable values('86'); Query OK, 1 row affected (0.08 sec) mysql> insert into DemoTable values('45'); Query OK, 1 row affected (0.12 sec) mysql> insert into DemoTable values('85'); Query OK, 1 row affected (0.08 sec) mysql> insert into DemoTable values('085'); Query OK, 1 row affected (0.14 sec) ...
Read MoreConverting boolean values to positive or negative sign in MySQL?
Following is the syntax −select if(yourColumnName, 1, -1) from yourTableName;Let us first create a table −mysql> create table DemoTable ( isMarried boolean ); Query OK, 0 rows affected (0.60 sec)Insert some records in the table using insert command −mysql> insert into DemoTable values(true); Query OK, 1 row affected (0.21 sec) mysql> insert into DemoTable values(false); Query OK, 1 row affected (0.10 sec) mysql> insert into DemoTable values(false); Query OK, 1 row affected (0.10 sec) mysql> insert into DemoTable values(true); Query OK, 1 row affected (0.36 sec)Display all records from the table using select statement −mysql> select *from DemoTable;This will ...
Read MoreSet a custom value for NULL or empty values in MySQL
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 row affected (0.09 sec) mysql> insert into DemoTable values('200'); Query OK, 1 row affected (0.06 sec) mysql> insert into DemoTable values(null); Query OK, 1 row affected (0.12 sec)Display all records from the table using select statement −mysql> select *from DemoTable;This will produce the following output −+-------+ | Value | +-------+ ...
Read MoreFind the number of logins between two dates in MySQL
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 sec) mysql> insert into DemoTable values('2019-08-12'); Query OK, 1 row affected (0.17 sec) mysql> insert into DemoTable values('2019-08-20'); Query OK, 1 row affected (0.09 sec) mysql> insert into DemoTable values('2019-08-24'); Query OK, 1 row affected (0.12 sec)Display all records from the table using select statement −mysql> select *from DemoTable;This will ...
Read MoreDisplay multiple selected rows using MySQL IN()
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) mysql> insert into DemoTable1045(FirstName) values('Chris'); Query OK, 1 row affected (0.27 sec) mysql> insert into DemoTable1045(FirstName) values('Robert'); Query OK, 1 row affected (0.10 sec) mysql> insert into DemoTable1045(FirstName) values('Mike'); Query OK, 1 row affected (0.12 sec) mysql> insert into DemoTable1045(FirstName) values('Adam'); Query OK, 1 row affected (0.08 sec)Display all records ...
Read More