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
MySQL Articles
Page 206 of 355
How to compare the first date and the last date from a MySQL column with date records?
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> insert into DemoTable values('Adam', '2019-08-24 11:10:00'); Query OK, 1 row affected (0.12 sec) mysql> insert into DemoTable values('Adam', '2019-08-24 11:20:00'); Query OK, 1 row affected (0.17 sec) mysql> insert into DemoTable values('Adam', '2019-08-24 11:50:00'); Query OK, 1 row affected (0.13 sec)Display all records from the table using select statement −mysql> ...
Read MoreHow to get multiple rows in a single MySQL query?
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 values(110, 'David'); Query OK, 1 row affected (0.13 sec) mysql> insert into DemoTable values(120, 'Robert'); Query OK, 1 row affected (0.17 sec) mysql> insert into DemoTable values(130, 'Mike'); Query OK, 1 row affected (0.13 sec)Display all records from the table using select statement −mysql> select *from DemoTable;This will produce the ...
Read MoreCan we use WHERE clause inside MySQL CASE statement?
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); Query OK, 1 row affected (0.16 sec) mysql> insert into DemoTable1040 values(40, 20, 50); Query OK, 1 row affected (0.15 sec) mysql> insert into DemoTable1040 values(80, 90, 100); Query OK, 1 row affected (0.11 sec)Display all records from the table using select statement −mysql> select *from DemoTable1040;This will produce the ...
Read MoreHow to get left substring in MySQL from a column with file path? Display the entire file path string excluding the file name?
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 ); Query OK, 0 rows affected (0.57 secInsert some records in the table using insert command −mysql> insert into DemoTable values('/MyFile/JavaProgram/Hello.java'); Query OK, 1 row affected (0.27 sec) mysql> insert into DemoTable values('/C/AllPrograms/animation.gif'); Query OK, 1 row affected (0.11 sec) mysql> insert into DemoTable values('/E/FavFile/ChatProgram.java'); Query OK, 1 row affected ...
Read MoreHow to get the fourth highest value using MySQL query?
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 row affected (0.15 sec) mysql> insert into DemoTable values(670); Query OK, 1 row affected (0.19 sec) mysql> insert into DemoTable values(890); Query OK, 1 row affected (0.15 sec) mysql> insert into DemoTable values(995); Query OK, 1 row affected (0.25 sec) mysql> insert into DemoTable values(198); Query OK, 1 row affected ...
Read MoreAdd a column count in a MySQL query on the basis of last name records?
Let us first create a table −mysql> create table DemoTable ( Id int NOT NULL AUTO_INCREMENT PRIMARY KEY, FirstName varchar(100), LastName varchar(100) ); Query OK, 0 rows affected (1.00 sec)Insert some records in the table using insert command −mysql> insert into DemoTable(FirstName, LastName) values('David', 'Miller'); Query OK, 1 row affected (0.35 sec) mysql> insert into DemoTable(FirstName, LastName) values('Carol', 'Miller'); Query OK, 1 row affected (0.37 sec) mysql> insert into DemoTable(FirstName, LastName) values('John', 'Doe'); Query OK, 1 row affected (0.21 sec)Display all records from the table using select statement −mysql> select *from DemoTable;This will produce the following output ...
Read MoreHow to suppress warnings in MySQL?
To suppress warnings, set SQL_NOTES=0. Let us see an example.At first, we will set SQL_NOTES to 1 −mysql> SET sql_notes = 1; Query OK, 0 rows affected (0.00 sec)Now, let us drop a table which does not exist. As you can see a warning message is now visible −mysql> drop table if exists web.DemoTable; Query OK, 0 rows affected, 1 warning (0.07 sec)To look at the above warning message, you need to just use the SHOW WARNINGS command −mysql> show warnings;This will produce the following output displaying the warning message −+-------+------+-----------------------------------+ | Level | Code | Message ...
Read MoreSort values that contain letters and symbols in custom order with MySQL
For custom order, use ORDER BY FIELD(). Let us first create a table −mysql> create table DemoTable ( Title varchar(100) ); Query OK, 0 rows affected (0.62 sec)Insert some records in the table using insert command −mysql> insert into DemoTable values('Java_1+'); Query OK, 1 row affected (0.14 sec) mysql> insert into DemoTable values('MySQL_23+'); Query OK, 1 row affected (0.10 sec) mysql> insert into DemoTable values('MongoDB++'); Query OK, 1 row affected (0.13 sec) mysql> insert into DemoTable values('C++_23'); Query OK, 1 row affected (0.13 sec)Display all records from the table using select statement −mysql> select *from DemoTable;This will produce the ...
Read MoreMySQL query to display records on the basis of conditions IS NULL OR !=1;?
Let us first create a table −mysql> create table DemoTable ( Id int NOT NULL AUTO_INCREMENT PRIMARY KEY, Name varchar(100), Score int ); Query OK, 0 rows affected (1.10 sec)Insert some records in the table using insert command −mysql> insert into DemoTable(Name, Score) values('John', 45); Query OK, 1 row affected (0.14 sec) mysql> insert into DemoTable(Name, Score) values('Chris', null); Query OK, 1 row affected (0.14 sec) mysql> insert into DemoTable(Name, Score) values('David', null); Query OK, 1 row affected (0.11 sec) mysql> insert into DemoTable(Name, Score) values('Bob', 1); Query OK, 1 row affected (0.11 sec)Display all records from ...
Read MoreFetch datetime row from exactly past 7 days records in MySQL
For this, you can use the INTERVAL 7 day concept. Let us first create a table −mysql> create table DemoTable ( Id int NOT NULL AUTO_INCREMENT PRIMARY KEY, AdmissionDate datetime ); Query OK, 0 rows affected (0.83 sec)Note − Let’s say the current date is 2019-08-23.Insert some records in the table using insert command −mysql> insert into DemoTable(AdmissionDate) values('2019-01-23'); Query OK, 1 row affected (0.17 sec) mysql> insert into DemoTable(AdmissionDate) values('2019-08-15'); Query OK, 1 row affected (0.22 sec) mysql> insert into DemoTable(AdmissionDate) values('2019-08-16'); Query OK, 1 row affected (0.23 sec) mysql> insert into DemoTable(AdmissionDate) values('2019-08-24'); Query OK, 1 ...
Read More