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MySQLi Articles
Page 249 of 341
How to lowercase the entire string keeping the first letter in uppercase with MySQL?
Let us first create a table −mysql> create table DemoTable -> ( -> Name varchar(100) -> ); Query OK, 0 rows affected (1.32 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> insert into DemoTable values('CHRIS'); Query OK, 1 row affected (0.16 sec) mysql> insert into DemoTable values('DAVID'); Query OK, 1 row affected (0.15 sec) mysql> insert into DemoTable values('RObert'); Query OK, 1 row affected (0.21 sec)Display all records from the table using select statement −mysql> select *from DemoTable;Output+--------+ | Name ...
Read MoreOrder by on a specific number in MySQL?
Let us first create a table −mysql> create table DemoTable -> ( -> status int -> ); Query OK, 0 rows affected (0.66 sec)Insert some records in the table using insert command −mysql> insert into DemoTable values(30); Query OK, 1 row affected (0.17 sec) mysql> insert into DemoTable values(20); Query OK, 1 row affected (0.12 sec) mysql> insert into DemoTable values(20); Query OK, 1 row affected (0.14 sec) mysql> insert into DemoTable values(30); Query OK, 1 row affected (0.16 sec) mysql> insert into DemoTable values(10); Query OK, 1 row affected (0.14 sec) ...
Read MoreSELECT last entry without using LIMIT in MySQL?
For this, you can use subquery. Let us first create a table −mysql> create table DemoTable -> ( -> Id int NOT NULL AUTO_INCREMENT PRIMARY KEY, -> Name varchar(100) -> ); Query OK, 0 rows affected (0.54 sec)Insert some records in the table using insert command −mysql> insert into DemoTable(Name) values('John Smith'); Query OK, 1 row affected (0.18 sec) mysql> insert into DemoTable(Name) values('David Miller'); Query OK, 1 row affected (0.13 sec) mysql> insert into DemoTable(Name) values('Chris Brown'); Query OK, 1 row affected (0.22 sec)Display all records from the table using select statement −mysql> ...
Read MoreHow to perform string matching in MySQL?
For string matching, use LIKE operator. Let us first create a table −mysql> create table DemoTable -> ( -> MonthName varchar(100) -> ); Query OK, 0 rows affected (0.63 sec)Insert some records in the table using insert command −mysql> insert into DemoTable values('JFMA'); Query OK, 1 row affected (0.19 sec) mysql> insert into DemoTable values('JMA'); Query OK, 1 row affected (0.16 sec) mysql> insert into DemoTable values('JDN'); Query OK, 1 row affected (0.16 sec) mysql> insert into DemoTable values('JFOSA'); Query OK, 1 row affected (0.19 sec)Display all records from the table using select statement ...
Read MoreSum the values in a column in MySQL?
For this, use the aggregate function SUM(). Let us first create a table −mysql> create table DemoTable -> ( -> Id int NOT NULL AUTO_INCREMENT PRIMARY KEY, -> € int -> ); Query OK, 0 rows affected (0.71 sec)Insert some records in the table using insert command −mysql> insert into DemoTable(€) values(10); Query OK, 1 row affected (0.14 sec) mysql> insert into DemoTable(€) values(200); Query OK, 1 row affected (0.11 sec) mysql> insert into DemoTable(€) values(190); Query OK, 1 row affected (0.14 sec)Display all records from the table using select statement −mysql> select *from ...
Read MoreMySQL query with OR & AND conditions
Let us first create a table −mysql> create table DemoTable -> ( -> Id int NOT NULL AUTO_INCREMENT PRIMARY KEY, -> Name varchar(20), -> Age int -> ); Query OK, 0 rows affected (0.63 sec)Insert some records in the table using insert command −mysql> insert into DemoTable(Name, Age) values('John', 21); Query OK, 1 row affected (0.16 sec) mysql> insert into DemoTable(Name, Age) values(Null, 20); Query OK, 1 row affected (0.12 sec) mysql> insert into DemoTable(Name, Age) values('David', 23); Query OK, 1 row affected (0.16 sec) mysql> insert into DemoTable(Name, Age) values('Carol', null); ...
Read MoreReturn the first n letters of a column in MySQL
To return the first n letters, use the LEFT() function. Following is the syntax −select left(yourColumnName, yourValue) from yourTableName;Let us first create a table −mysql> create table DemoTable -> ( -> Id int NOT NULL AUTO_INCREMENT PRIMARY KEY, -> CourseTitle text -> ); Query OK, 0 rows affected (0.65 sec)Insert some records in the table using insert command −mysql> insert into DemoTable(CourseTitle) values('Java with Spring and Hibernate framework'); Query OK, 1 row affected (0.43 sec) mysql> insert into DemoTable(CourseTitle) values('Python Web Development'); Query OK, 1 row affected (0.22 sec)Display all records from the table using ...
Read MoreGROUP BY a column in another MySQL table
For this, you can use CREATE TABLE AS SELECT statement. Let us first create a table −mysql> create table DemoTable1 -> ( -> Id int NOT NULL AUTO_INCREMENT PRIMARY KEY, -> CountryName varchar(20) -> ); Query OK, 0 rows affected (0.68 sec)Insert some records in the table using insert command −mysql> insert into DemoTable1(CountryName) values('US'); Query OK, 1 row affected (0.15 sec) mysql> insert into DemoTable1(CountryName) values('UK'); Query OK, 1 row affected (0.27 sec) mysql> insert into DemoTable1(CountryName) values('AUS'); Query OK, 1 row affected (0.11 sec) mysql> insert into DemoTable1(CountryName) values('UK'); Query OK, ...
Read MoreHow to get the previous day with MySQL CURDATE()?
Let us first get the current date using CURDATE(). The current date is as follows −mysql> select CURDATE(); +------------+ | CURDATE() | +------------+ | 2019-06-09 | +------------+ 1 row in set (0.00 sec)Let us first create a table −mysql> create table DemoTable -> ( -> Id int NOT NULL AUTO_INCREMENT PRIMARY KEY, -> ShippingDate date -> ); Query OK, 0 rows affected (0.63 sec)Insert some records in the table using insert command. While inserting, we have used date_sub to get the previous day −mysql> insert into DemoTable(ShippingDate) values(date_sub(CURDATE(), interval 1 day)); Query OK, 1 row ...
Read MoreMySQL query to avoid displaying duplicates values?
For this, you can use GROUP BY and use COUNT to get only non-duplicate values. Following is the syntax −select yourColumnName from yourTableName group by yourColumnName having count(*)=1;Let us first create a table −mysql> create table DemoTable -> ( -> Id int NOT NULL AUTO_INCREMENT PRIMARY KEY, -> Subject varchar(100) -> ); Query OK, 0 rows affected (0.70 sec)Insert some records in the table using insert command −mysql> insert into DemoTable(Subject) values('MySQL'); Query OK, 1 row affected (0.21 sec) mysql> insert into DemoTable(Subject) values('MongoDB'); Query OK, 1 row affected (0.14 sec) mysql> insert into ...
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