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Articles by Sharon Christine
Page 12 of 34
Top 5 Tools to prototype iOS and Android apps without coding
Advancements in technology have rendered the world digital and drives mankind to experience new wonders of astronomical proportions. Internet has moved us from relative absurdity to a path filled with clarity. Two of the many promising wonders of modern digital technology are the endearing fields of website development and mobile app development.What is Prototyping?Prototyping allows you to create a prototype version of your website/app without actually coding anything. Such prototypes can be used to create a basic functional model of the application, get initial feedback, give demos, experiment with UI/UX, etc.Prototyping is undoubtedly one of the many important stages of ...
Read MoreSwap data between two columns in MySQL?
To swap data between two columns in MySQL, use the concept of variable. Let us first create a table. Here, we will swap Name1 with Name2 −mysql> create table DemoTable -> ( -> Name1 varchar(100), -> Name2 varchar(100) -> ); Query OK, 0 rows affected (0.58 sec)Insert some records in the table using insert command −mysql> insert into DemoTable values('John Smith', 'Chris Brown'); Query OK, 1 row affected (0.10 sec) mysql> insert into DemoTable values('David Miller', 'Jone Doe'); Query OK, 1 row affected (0.16 sec)Display all records from the table using select statement −mysql> select *from DemoTable;OutputThis will produce ...
Read MoreMySQL stored procedure to return a column value?
Let us first create a table −mysql> create table DemoTable -> ( -> Id int, -> Score int -> ); Query OK, 0 rows affected (0.69 sec)Insert some records in the table using insert command −mysql> insert into DemoTable values(1, 858858686); Query OK, 1 row affected (0.11 sec) mysql> insert into DemoTable values(2, 9900554); Query OK, 1 row affected (0.22 sec) mysql> insert into DemoTable values(3, 646565667); Query OK, 1 row affected (0.15 sec)Display all records from the table using select statement −mysql> select *from DemoTable;OutputThis will produce the following output −+------+-----------+ | Id ...
Read MoreAdd values of two columns considering NULL values as zero in MySQL
For this, use COALESCE() function from MySQL. Let us first create a table −mysql> create table DemoTable -> ( -> Value1 int, -> Value2 int -> ); Query OK, 0 rows affected (0.51 sec)Insert some records in the table using insert command −mysql> insert into DemoTable values(100, 200); Query OK, 1 row affected (0.27 sec) mysql> insert into DemoTable values(NULL, 90); Query OK, 1 row affected (0.13 sec) mysql> insert into DemoTable values(NULL, NULL); Query OK, 1 row affected (0.12 sec) mysql> insert into DemoTable values(600, NULL); Query OK, 1 row affected (0.12 sec)Display all records from ...
Read MoreHow can I get the number of times a specific word appears in a column with MySQL?
For this, you can use COUNT() function. Let us first create a table −mysql> create table DemoTable -> ( -> EmployeeId int NOT NULL AUTO_INCREMENT PRIMARY KEY, -> EmployeeName varchar(100) -> ); Query OK, 0 rows affected (0.62 sec)Insert some records in the table using insert command −mysql> insert into DemoTable(EmployeeName) values('John'); Query OK, 1 row affected (0.21 sec) mysql> insert into DemoTable(EmployeeName) values('Carol'); Query OK, 1 row affected (0.17 sec) mysql> insert into DemoTable(EmployeeName) values('David'); Query OK, 1 row affected (0.14 sec) mysql> insert into DemoTable(EmployeeName) values('Carol'); Query OK, 1 row affected ...
Read MoreMySQL query to select top 10 records?
To select top 10 records, use LIMIT in MySQL. Let us first create a table −mysql> create table DemoTable -> ( -> PageNumber text -> ); Query OK, 0 rows affected (2.50 sec)Insert some records in the table using insert command −mysql> insert into DemoTable values('Page-1'); Query OK, 1 row affected (0.46 sec) mysql> insert into DemoTable values('Page-2'); Query OK, 1 row affected (0.11 sec) mysql> insert into DemoTable values('Page-3'); Query OK, 1 row affected (0.27 sec) mysql> insert into DemoTable values('Page-4'); Query OK, 1 row affected (0.19 sec) mysql> insert into DemoTable values('Page-5'); Query OK, ...
Read MoreConverting table from MyISAM to INNODB in MySQL?
For this, use ALTER command. Let us first create a table. The default engine is set as“MYISAM” −mysql> create table DemoTable -> ( -> ClientId int NOT NULL AUTO_INCREMENT, -> ClientName varchar(100), -> ClientAge int, -> ClientCountryName varchar(100), -> isMarried boolean, -> PRIMARY KEY(ClientId) -> )ENGINE=MyISAM; Query OK, 0 rows affected (0.67 sec)Following is the query to convert table from MyISAM to INNODB −mysql> alter table DemoTable ENGINE=InnoDB; Query OK, 0 rows affected (1.97 sec) Records: 0 Duplicates: 0 Warnings: 0Let us now check the status of table −mysql> show create table DemoTable;OutputThis will produce the following output displaying the ...
Read MoreHow to search on a MySQL varchar column using a number?
Use INSERT() function from MySQL. It has the following parameters −ParameterDescriptionstrString to be modifiedpositionPosition where to insert str2numberNumber of characters to replacestr2String to insert into strLet us first create a table −mysql> create table DemoTable -> ( -> Code varchar(100) -> ); Query OK, 0 rows affected (0.82 sec)Insert some records in the table using insert command −mysql> insert into DemoTable values('958575/98') ; Query OK, 1 row affected (0.16 sec) mysql> insert into DemoTable values('765432/99'); Query OK, 1 row affected (0.19 sec) mysql> insert into DemoTable values('983456/91'); Query OK, 1 row affected (0.15 sec)Display all ...
Read MoreOrder by desc except a single value in MySQL
Use ORDER BY and set DESC to order by desc. However, to get all the values except a single value, use the not equal operator.Let us first create a table −mysql> create table DemoTable -> ( -> Name varchar(100) -> ); Query OK, 0 rows affected (0.89 sec)Insert some records in the table using insert command −mysql> insert into DemoTable values('Sam'); Query OK, 1 row affected (0.17 sec) mysql> insert into DemoTable values('Chris'); Query OK, 1 row affected (0.19 sec) mysql> insert into DemoTable values('John'); Query OK, 1 row affected (0.15 sec) mysql> insert ...
Read MoreHow to search a MySQL table for a specific string?
Use equal to operator for an exact match −select *from yourTableName where yourColumnName=yourValue;Let us first create a table −mysql> create table DemoTable -> ( -> FirstName varchar(100), -> LastName varchar(100) -> ); Query OK, 0 rows affected (0.70 secInsert some records in the table using insert command −mysql> insert into DemoTable values('John', 'Smith'); Query OK, 1 row affected (0.14 sec) mysql> insert into DemoTable values('John', 'Doe'); Query OK, 1 row affected (0.19 sec) mysql> insert into DemoTable values('Chris', 'Brown'); Query OK, 1 row affected (0.13 sec) mysql> insert into DemoTable values('Carol', 'Taylor'); Query OK, 1 row affected ...
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