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Database Articles
Page 409 of 547
Two ways to fetch maximum value from a MySQL column with numbers
To fetch the maximum value, use any of the below-given syntaxes −select max(yourColumnName) from yourTableName; OR select *from yourTableName order by yourColumnName desc limit 1;Let us first create a table −mysql> create table DemoTable ( Value int ); Query OK, 0 rows affected (0.84 sec)Insert some records in the table using insert command −mysql> insert into DemoTable values(45); Query OK, 1 row affected (0.11 sec) mysql> insert into DemoTable values(87); Query OK, 1 row affected (0.18 sec) mysql> insert into DemoTable values(56); Query OK, 1 row affected (0.11 sec) mysql> insert into DemoTable values(77); Query OK, 1 row affected ...
Read MoreMySQL query for alphabetical search (ABC) with REGEXP?
For alphabetic search, use the REGEX in MySQL. Here, let’s say we are searching for records beginning with A, B or C. The syntax to use REGEXP for the same purpose is as follows −select *from yourTableName where yourColumnName REGEXP '^[ABC]';Let us first create a table −mysql> create table DemoTable ( Name varchar(100) ); Query OK, 0 rows affected (0.69 sec)Insert some records in the table using insert command −mysql> insert into DemoTable values('Chris'); Query OK, 1 row affected (0.12 sec) mysql> insert into DemoTable values('David'); Query OK, 1 row affected (0.15 sec) mysql> insert into DemoTable values('Mike'); Query ...
Read MoreUse TRIM on all records in a MySQL table?
TRIM is used to remove leading and trailing spaces. Let us first create a table −mysql> create table DemoTable ( StudentName varchar(100) ); Query OK, 0 rows affected (0.64 sec)Insert some records in the table using insert command. Here, we have inserted records with leading and trailing whitespaces −mysql> insert into DemoTable values(' Adam Smith '); Query OK, 1 row affected (0.19 sec) mysql> insert into DemoTable values(' David Miller '); Query OK, 1 row affected (0.10 sec) mysql> insert into DemoTable values(' Chris Brown '); Query OK, 1 row affected (0.15 sec) mysql> insert into DemoTable values(' Carol ...
Read MoreMySQL query to fetch the latest date from a table with date records
Let us first create a table −mysql> create table DemoTable ( DueDate date ); Query OK, 0 rows affected (0.56 sec)Insert some records in the table using insert command −mysql> insert into DemoTable values('2018-10-01'); Query OK, 1 row affected (0.14 sec) mysql> insert into DemoTable values('2016-12-31'); Query OK, 1 row affected (0.13 sec) mysql> insert into DemoTable values('2019-07-02'); Query OK, 1 row affected (0.16 sec) mysql> insert into DemoTable values('2015-01-12'); Query OK, 1 row affected (0.18 sec) mysql> insert into DemoTable values('2019-04-26'); Query OK, 1 row affected (0.13 sec)Display all records from the table using select statement −mysql> select ...
Read MoreGet maximum date from a list of varchar dates in MySQL
Let us first create a table −mysql> create table DemoTable ( AdmissionDate varchar(100) ); Query OK, 0 rows affected (0.76 sec)Insert some records in the table using insert command −mysql> insert into DemoTable values('Sunday, 11 August 2019'); Query OK, 1 row affected (0.10 sec) mysql> insert into DemoTable values('Friday, 18 October 2019'); Query OK, 1 row affected (0.13 sec) mysql> insert into DemoTable values('Thursday, 18 July 2019'); Query OK, 1 row affected (0.23 sec)Display all records from the table using select statement −mysql> select *from DemoTable ;This will produce the following output −+-------------------------+ | AdmissionDate ...
Read MoreQuery to divide the values of two columns and display the result in a new column using MySQL wildcard?
Let us first create a table −mysql> create table DemoTable ( Id int NOT NULL AUTO_INCREMENT PRIMARY KEY, Value1 int, Value2 int ); Query OK, 0 rows affected (0.55 sec)Insert some records in the table using insert command −mysql> insert into DemoTable(Value1, Value2) values(100, 150); Query OK, 1 row affected (0.17 sec) mysql> insert into DemoTable(Value1, Value2) values(500, 1000); Query OK, 1 row affected (0.09 sec) mysql> insert into DemoTable(Value1, Value2) values(15000, 18000); 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 following output ...
Read MoreHow do I replace "+"(plus sign) with SPACE in MySQL?
To replace, use REPLACE() function from MySQL. Let us first create a table −mysql> create table DemoTable ( Number varchar(100) ); Query OK, 0 rows affected (0.86 sec)Insert some records in the table using insert command −mysql> insert into DemoTable values('+916578675547'); Query OK, 1 row affected (0.17 sec) mysql> insert into DemoTable values('+918976676564'); Query OK, 1 row affected (0.17 sec) mysql> insert into DemoTable values('+919800087678'); 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 −+---------------+ | Number ...
Read MoreSelecting random entry from MySQL Database?
Let us first create a table −mysql> create table DemoTable ( Id int NOT NULL AUTO_INCREMENT PRIMARY KEY, ClientName varchar(100), ClientAge int ); Query OK, 0 rows affected (0.92 sec)Insert some records in the table using insert command −mysql> insert into DemoTable(ClientName, ClientAge) values('Robert', 45); Query OK, 1 row affected (0.17 sec) mysql> insert into DemoTable(ClientName, ClientAge) values('Mike', 55); Query OK, 1 row affected (0.13 sec) mysql> insert into DemoTable(ClientName, ClientAge) values('Bob', 42); Query OK, 1 row affected (0.08 sec) mysql> insert into DemoTable(ClientName, ClientAge) values('Sam', 47); Query OK, 1 row affected (0.11 sec)Display all records from ...
Read MoreHow to get the 2nd highest value from a table with Student Score?
To fetch the 2nd highest value, use ORDER BY DESC with LIMIT 1, 1. Let us first create a table −mysql> create table DemoTable ( StudentScore int ); Query OK, 0 rows affected (0.56 sec)Insert some records in the table using insert command −mysql> insert into DemoTable values(89); Query OK, 1 row affected (0.16 sec) mysql> insert into DemoTable values(69); Query OK, 1 row affected (0.10 sec) mysql> insert into DemoTable values(97); Query OK, 1 row affected (0.17 sec) mysql> insert into DemoTable values(99); Query OK, 1 row affected (0.12 sec)Display all records from the table using select statement ...
Read MoreHow to retrieve the corresponding value for NULL with a MySQL query?
For this, use IS NULL property. Let us first create a table −mysql> create table DemoTable ( EmployeeName varchar(100), EmployeeAge int ); Query OK, 0 rows affected (0.59 sec)Insert some records in the table using insert command −mysql> insert into DemoTable values('Chris', 32); Query OK, 1 row affected (0.11 sec) mysql> insert into DemoTable values('David', 45); Query OK, 1 row affected (0.09 sec) mysql> insert into DemoTable values('Bob', NULL); Query OK, 1 row affected (0.16 sec) mysql> insert into DemoTable values('Sam', 28); Query OK, 1 row affected (0.14 sec)Display all records from the table using select statement −mysql> ...
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