MySQLi Articles - Page 186 of 388

No, you need to use open and close parenthesis like this ( ) while creating a table. Use the below syntax −CREATE TABLE IF NOT EXISTS yourTableName (    yourColumnName1 dataType1,    .    .    .    .    .    N );Let us first create a table −mysql> CREATE TABLE IF NOT EXISTS DemoTable    (    CustomerId int,    CustomerName varchar(20),    CustomerAge int    ,    PRIMARY KEY(CustomerId)    ); Query OK, 0 rows affected (0.58 sec)Insert some records in the table using insert command −mysql> insert into DemoTable values(1, 'Chris', 25); Query OK, 1 row ... Read More

Let us first create a table −mysql> create table DemoTable    (    Id int NOT NULL AUTO_INCREMENT PRIMARY KEY,    Subject varchar(20),    Price int    ); Query OK, 0 rows affected (0.64 sec)Insert some records in the table using insert command −mysql> insert into DemoTable(Subject, Price) values('MySQL', 456); Query OK, 1 row affected (0.16 sec) mysql> insert into DemoTable(Subject, Price) values('MySQL', 456); Query OK, 1 row affected (0.12 sec) mysql> insert into DemoTable(Subject, Price) values('MongoDB', 56); Query OK, 1 row affected (0.16 sec) mysql> insert into DemoTable(Subject, Price) values('MongoDB', 60); Query OK, 1 row affected (0.13 sec) mysql> ... Read More

For this, use the LIKE operator. Let us first create a table:mysql> create table DemoTable    (    Id int NOT NULL AUTO_INCREMENT PRIMARY KEY,    Password varchar(100)    ); Query OK, 0 rows affected (1.27 sec)Insert some records in the table using insert command −mysql> insert into DemoTable(Password) values('John@--123'); Query OK, 1 row affected (0.19 sec) mysql> insert into DemoTable(Password) values('---Carol234'); Query OK, 1 row affected (0.20 sec) mysql> insert into DemoTable(Password) values('--David987'); Query OK, 1 row affected (0.13 sec) mysql> insert into DemoTable(Password) values('Mike----53443'); Query OK, 1 row affected (0.30 sec)Display all records from the table using select ... Read More

For year and month date fetching, you can use YEAR() and MONTH() function in MySQL. Let us first create a table −mysql> create table DemoTable    (    Id int NOT NULL AUTO_INCREMENT PRIMARY KEY,    ShippingDate datetime    ); Query OK, 0 rows affected (0.48 sec)Insert some records in the table using insert command −mysql> insert into DemoTable(ShippingDate) values('2019-01-31'); Query OK, 1 row affected (0.16 sec) mysql> insert into DemoTable(ShippingDate) values('2018-12-01'); Query OK, 1 row affected (0.19 sec) mysql> insert into DemoTable(ShippingDate) values('2019-06-02'); Query OK, 1 row affected (0.22 sec) mysql> insert into DemoTable(ShippingDate) values('2019-11-18'); Query OK, 1 row ... Read More

For this, you can use multiple OR. Let us first create a table −mysql> create table DemoTable    (    Id int NOT NULL AUTO_INCREMENT PRIMARY KEY,    FirstName varchar(10),    LastName varchar(10),    Age int,    CountryName varchar(10)    ); Query OK, 0 rows affected (0.58 sec)Insert some records in the table using insert command −mysql> insert into DemoTable(FirstName, LastName, Age, CountryName) values('John', 'Smith', 21, 'US'); Query OK, 1 row affected (0.15 sec) mysql> insert into DemoTable(FirstName, LastName, Age, CountryName) values('Carol', 'Taylor', 22, 'AUS'); Query OK, 1 row affected (0.16 sec) mysql> insert into DemoTable(FirstName, LastName, Age, CountryName) values('David', ... Read More

For this, use the aggregate function COUNT() along with GROUP BY. Let us first create a table −mysql> create table DemoTable    (    Id int NOT NULL AUTO_INCREMENT PRIMARY KEY,    Value int    ); Query OK, 0 rows affected (0.74 sec)Insert some records in the table using insert command −mysql> insert into DemoTable(Value) values(976); Query OK, 1 row affected (0.13 sec) mysql> insert into DemoTable(Value) values(67); Query OK, 1 row affected (0.12 sec) mysql> insert into DemoTable(Value) values(67); Query OK, 1 row affected (0.11 sec) mysql> insert into DemoTable(Value) values(1); Query OK, 1 row affected (0.27 sec) mysql> ... Read More

To add two weeks to a date in MySQL, use DATE_ADD() −insert into yourTableName(yourColumnName) values(date_add(now(), interval 2 week));Let us first create a table −mysql> create table DemoTable    (    Id int NOT NULL AUTO_INCREMENT PRIMARY KEY,    ShippingDate datetime    ); Query OK, 0 rows affected (0.62 sec)Following is the query to get the current date −mysql> select now(); +-----------------------+ | now() | +-----------------------+ | 2019-06-02 10 :36 :49 | +-----------------------+ 1 row in set (0.00 sec)Insert some records in the table using ... Read More

Let us first create a table with one of the column as ID −mysql> create table DemoTable    (    ID int,    StudentName varchar(10),    CountryName varchar(20)    ); Query OK, 0 rows affected (0.70 sec)Insert some records in the table using insert command −mysql> insert into DemoTable values(0, 'David', 'AUS'); Query OK, 1 row affected (0.24 sec) mysql> insert into DemoTable values(3, 'Chris', 'UK'); Query OK, 1 row affected (0.27 sec) mysql> insert into DemoTable values(8, 'Carol', 'US'); Query OK, 1 row affected (0.26 sec) mysql> insert into DemoTable values(9, 'Sam', 'US'); Query OK, 1 row affected (0.14 ... Read More

Use keyword AS for this. Let us first create a table −mysql> create table DemoTable    (    Id int NOT NULL AUTO_INCREMENT PRIMARY KEY,    Name varchar(20)    ); Query OK, 0 rows affected (3.16 sec)Insert some records in the table using insert command −mysql> insert into DemoTable(Name) values('John'); Query OK, 1 row affected (0.50 sec) mysql> insert into DemoTable(Name) values('Robert'); Query OK, 1 row affected (0.29 sec) mysql> insert into DemoTable(Name) values('David'); Query OK, 1 row affected (0.54 sec)Display all records from the table using select statement −mysql> select *from DemoTable;Output+----+--------+ | Id | Name | ... Read More

To order with a custom rule, use the ORDER BY FIELD(). Let us first create a table −mysql> create table DemoTable    (    Number int    ); Query OK, 0 rows affected (0.55 sec)Insert some records in the table using insert command −mysql> insert into DemoTable values(1); Query OK, 1 row affected (0.14 sec) mysql> insert into DemoTable values(4); Query OK, 1 row affected (0.22 sec) mysql> insert into DemoTable values(2); Query OK, 1 row affected (0.15 sec) mysql> insert into DemoTable values(3); Query OK, 1 row affected (0.14 sec)Display all records from the table using select statement −mysql> ... Read More