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MySQLi Articles
Page 95 of 341
MySQL regular expression to update a table with column values including string, numbers and special characters
For this, use UPDATE command along with REGEXP. Let us first create a table −mysql> create table DemoTable2023 -> ( -> StreetNumber varchar(100) -> ); Query OK, 0 rows affected (0.59 sec)Insert some records in the table using insert command −mysql> insert into DemoTable2023 values('7'); Query OK, 1 row affected (0.17 sec) mysql> insert into DemoTable2023 values('1'); Query OK, 1 row affected (0.14 sec) mysql> insert into DemoTable2023 values('AUS-100'); Query OK, 1 row affected (0.15 sec) mysql> insert into DemoTable2023 values('US-101'); Query OK, 1 row affected (0.11 sec)Display all records from the table using ...
Read MoreHow do I insert multiple values in a column with a single MySQL query?
To insert multiple values in a column, the syntax is as follows −insert into yourTableName values(yourValue1), (yourValue2), ..........N;To understand the above syntax, let us create a table −mysql> create table DemoTable2022 -> ( -> Department varchar(100) -> ); Query OK, 0 rows affected (0.49 sec)Insert some records in the table using insert command −mysql> insert into DemoTable2022 values('Computer Science'), ('Information Technology'), ('Civil'), ('Mechanical'), ('Electronics'), ('Electrical'); Query OK, 6 rows affected (0.46 sec) Records: 6 Duplicates: 0 Warnings: 0Display all records from the table using select statement −mysql> select *from DemoTable2022;This will produce the following ...
Read MoreInsert data from one schema to another in MySQL?
To insert data from one scheme to another, the syntax is as follows. Here, we have two databases “yourDatabaseName1” and “yourDatabaseName2” −insert into yourDatabaseName2.yourTableName2 select *from yourDatabaseName1.yourTableName1;To understand the above syntax, let us create a table. We are creating a table in database “web” −mysql> create table DemoTable2020 -> ( -> Id int, -> Name varchar(20) -> ); Query OK, 0 rows affected (0.67 sec)Insert some records in the table using insert command −mysql> insert into DemoTable2020 values(101, 'Chris'); Query OK, 1 row affected (0.12 sec) mysql> insert into DemoTable2020 values(102, 'David'); Query OK, 1 ...
Read MoreMySQL: update field with Group By?
To update field with GROUP BY, use ORDER BY LIMIT with UPDATE command −mysql> create table DemoTable2018 -> ( -> EmployeeId int NOT NULL AUTO_INCREMENT PRIMARY KEY, -> EmployeeName varchar(20), -> EmployeeSalary int -> ); Query OK, 0 rows affected (0.61 sec)Insert some records in the table using insert command −mysql> insert into DemoTable2018(EmployeeName, EmployeeSalary) values('Chris', 10000); Query OK, 1 row affected (0.19 sec) mysql> insert into DemoTable2018(EmployeeName, EmployeeSalary) values('David', 12560); Query OK, 1 row affected (0.18 sec) mysql> insert into DemoTable2018(EmployeeName, EmployeeSalary) values('Chris', 25400); Query OK, 1 row affected (0.09 sec)Display all ...
Read MoreMySQL query to update all records to capitalize only the first letter and set all others in lowercase
Let us first create a table −mysql> create table DemoTable2017 -> ( -> Name text -> ); Query OK, 0 rows affected (0.55 sec)Insert some records in the table using insert command −mysql> insert into DemoTable2017 values('JOHN SMITH, MYSQL'); Query OK, 1 row affected (0.13 sec) mysql> insert into DemoTable2017 values('DAVID MILLER, MONGODB'); Query OK, 1 row affected (0.12 sec) mysql> insert into DemoTable2017 values('CHRIS BROWN, JAVA'); Query OK, 1 row affected (0.11 sec)Display all records from the table using select statement −mysql> select *from DemoTable2017;This will produce the following output −+----------------------+ | Name ...
Read MoreSet 'alias' for all the column names in a single MySQL query
To set alias for column names, the syntax is as follows −select yourColumnName1 anyAliasName1, yourColumnName2 anyAliasName2 from yourTableName anyAliasName;To understand the above syntax, let us create a table −mysql> create table DemoTable2014 -> ( -> FirstName varchar(20), -> LastName varchar(20) -> ); Query OK, 0 rows affected (0.70 sec)Insert some records in the table using insert command −mysql> insert into DemoTable2014 values('John', 'Smith'); Query OK, 1 row affected (0.17 sec) mysql> insert into DemoTable2014 values('David', 'Miller'); Query OK, 1 row affected (0.16 sec) mysql> insert into DemoTable2014 values('John', 'Doe'); Query OK, ...
Read MoreSet MySQL select in a custom variable
Let us first create a table −mysql> create table DemoTable2013 -> ( -> Name varchar(20) -> ); Query OK, 0 rows affected (0.63 sec)Insert some records in the table using insert command −mysql> insert into DemoTable2013 values('Chris'); Query OK, 1 row affected (0.13 sec) mysql> insert into DemoTable2013 values('David'); Query OK, 1 row affected (0.14 sec) mysql> insert into DemoTable2013 values('Mike'); Query OK, 1 row affected (0.19 sec) mysql> insert into DemoTable2013 values('Sam'); Query OK, 1 row affected (0.10 sec) mysql> insert into DemoTable2013 values('Bob'); Query OK, 1 row affected (0.12 sec)Display all ...
Read MoreFormat date while inserting records in MySQL
To format date while inserting records, use DATE_FORMAT() in the MySQL INSERT statement. Let us first create a table −mysql> create table DemoTable2012 -> ( -> ShippingDate varchar(20) -> ); Query OK, 0 rows affected (0.48 sec)Insert some records in the table using insert command −mysql> insert into DemoTable2012 values(date_format(curdate(), '%d.%m.%Y')); Query OK, 1 row affected (0.14 sec) mysql> insert into DemoTable2012 values(date_format(now(), '%d.%m.%Y')); Query OK, 1 row affected (0.13 sec) mysql> insert into DemoTable2012 values(date_format('2014-01-21', '%d.%m.%Y')); Query OK, 1 row affected (0.17 sec)Display all records from the table using select statement −mysql> select *from ...
Read MoreHow to add a specific character to any empty space in MySQL table values?
For this, use REPLACE() function and replace empty space with the character. Let us first create a table −mysql> create table DemoTable (Subject text); Query OK, 0 rows affected (0.86 sec)ExampleInsert some records in the table using insert command −mysql> insert into DemoTable values('Introduction to MySQL'); Query OK, 1 row affected (0.15 sec) mysql> insert into DemoTable values('Java in depth'); Query OK, 1 row affected (0.21 sec) mysql> insert into DemoTable values('Data Structure and Algorithm'); Query OK, 1 row affected (0.16 sec)Display all records from the table using select statement −mysql> select *from DemoTable;Output+------------------------------+ | Subject | +------------------------------+ | Introduction ...
Read MoreMySQL query to select records from a table on the basis of a particular month number?
You can select specific month with the help of MONTH() function. The syntax is as follows −SELECT yourColumnName FROM yourTableName WHERE MONTH(yourColumnName) = yourValue;To understand the above syntax, let us create a table. The query to create a table is as follows −mysql> create table UserLoginTimeInformation -> ( -> UserId int NOT NULL AUTO_INCREMENT PRIMARY KEY, -> UserLoginDatetime datetime -> ); Query OK, 0 rows affected (0.55 sec)Insert some records in the table using insert command. The query is as follows −mysql> insert into UserLoginTimeInformation(UserLoginDatetime) values(date_add(now(), interval 3 month)); Query OK, 1 row affected (0.14 sec) ...
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