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Articles by Anvi Jain
Page 43 of 43
MySQL command line client for Windows?
In order to install MySQL command line client for Windows, you need to visit the following URL to get the download link https://dev.mysql.com/downloads/mysql/ −The snapshot is as follows −After that you need to select operating system. The snapshot is as follows −You need to choose Windows (x86, 32/64-bit) and download the installer.
Read MoreHow to front pad zip code with "0" in MySQL?
To front pad zip code with 0, use LPAD() function in MySQL. The syntax is as follows −SELECT LPAD(yourColumnName, columnWidth+1, '0') as anyVariableName from yourTableName;To understand the above concept of LPAD() to add front pad zip code with 0, let us create a table. One of the columns of the table is Zip Code. The following is the query to create a table.mysql> create table ZipCodePadWithZeroDemo −> ( −> Name varchar(200), −> YourZipCode int(6) −> ); Query OK, 0 rows affected (0.44 sec)Insert some records in the table. The query to insert records is as follows ...
Read MoreHow to store Query Result in a variable using MySQL?
To store query result in a variable with MySQL, use the SET command. The syntax is as follows −SET @anyVariableName = ( yourQuery);To understand the above concept, let us create a table. The following is the query to create a table −mysql> create table QueryResultDemo −> ( −> Price int −> ); Query OK, 0 rows affected (0.59 sec)Now let us insert some records into the table. The following is the query to insert records −mysql> insert into QueryResultDemo values(100); Query OK, 1 row affected (0.17 sec) mysql> insert into QueryResultDemo values(20); Query OK, 1 row ...
Read MoreHow to order records by a column in MySQL and place empty records at the end?
To get order by column and place empty records at the end, use ORDER By and “is null” from MySQL. The syntax is as follows −select *from yourTableName order by if(yourColumName = ’ ’ or yourColumName is null, 1, 0), yourColumnName;To understand the above syntax, let us create a table. The query to create a table is as follows −mysql> create table emptyCellsAtEnd −> ( −> ProductId varchar(100) −> ); Query OK, 0 rows affected (0.65 sec)Insert some records in the table using insert command. Some of these records are empty. The query is as follows −mysql> ...
Read MoreDecrease a row value by 1 in MySQL?
You can increase and decrease row value by 1 in MySQL using UPDATE command. The syntax is as follows −UPDATE yourTableName set yourColumnName = yourColumnName-1 where condition;Let us create a table to decrease row value by 1. The following is the query −mysql> create table IncrementAndDecrementValue −> ( −> UserId int, −> UserScores int −> ); Query OK, 0 rows affected (0.60 sec)Insert some records in the table using insert command. The query is as follows −mysql> insert into IncrementAndDecrementValue values(101, 20000); Query OK, 1 row affected (0.13 sec) mysql> insert into IncrementAndDecrementValue values(102, 30000); ...
Read MoreDifference between #include and #include "filename" in C/C++?
The difference between the two forms is in the location where the preprocessor searches for the file to be included.#include The preprocessor searches in an implementation-dependent manner, it searches directories pre-designated by the compiler. This method is usually used to include standard library header files.#include "filename"The preprocessor searches in the same directory as the file containing the directive. If this fails, then it starts behaving like the #include form. This method is usually used to include your own header files.
Read MoreHow Can we permanently define user-defined variable for a client in MySQL?
In MySQL, it is not possible that a client can hold user variable permanently. It is because all the variables for a given client connection are automatically freed when that client exits.
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