How can we write MySQL query for inner joins with the help of Comma operator?

Published on 20-Feb-2018 16:00:30
Writing inner joins with the help of comma operator is the most basic way to combine two tables. As we know that we can also write inner join by using keyword INNER JOIN or synonyms like JOIN. To form an inner join we need to specify a particular condition which ... Read More

What are the complexities MySQL joins involve?

Giri Raju
Published on 20-Feb-2018 15:57:18
Actually, in simple words, we can say that a join between tables is an extension of a single-table SELECT statement but it involves the additional complexities:Need to specify all the tablesWe need to specify all the tables in FROM clause which are involved in the join. It is in contrast ... Read More

How MySQL REPLACE() function replaces strings in multiple records?

Arjun Thakur
Published on 20-Feb-2018 15:58:28
If we want to replace strings in multiple records then REPLACE() function must have the column name as 1st argument i.e. at the place of string. It means that, it will replace all the substring with another substring in that particular column. We can also use REPLACE() function with WHERE ... Read More

How can we use MySQL REVERSE() function on column’s data along with WHERE clause?

Published on 20-Feb-2018 15:55:24
MySQL REVERSE() function can have the column name as an argument to invert its value. If we want to apply some condition/s then it can be used along with WHERE clause as follows:Examplemysql> Select Name, REVERSE(Name) from Student; +---------+---------------+ | Name    | REVERSE(Name) | +---------+---------------+ | Aarav   | ... Read More

In MySQL, how can we get the number code of a particular character?

Sharon Christine
Published on 20-Feb-2018 15:54:59
With the help of MySQL string function ASCII(), we can get the number code of a particular character. Its syntax is ASCII(str) where, str, the argument of ASCII() function, is the string whose ASCII value of the first character to be retrieved.It will return the number code the left the ... Read More

How can it be possible to invert a string in MySQL?

Published on 20-Feb-2018 15:53:53
MySQL REVERSE() function make it possible to invert a string. Its syntax is as follows −SyntaxREVERSE(STR)Here, STR is a string which we want to invert.Examplemysql> Select REVERSE('MySQL'); +------------------+ | REVERSE('MySQL') | +------------------+ | LQSyM            | +------------------+ 1 row in set (0.05 sec)

What happens if I will prepare the statement with the same name without de-allocating the earlier one?

Published on 20-Feb-2018 15:30:14
Actually, in MySQL, we can prepare a statement with the same name without de-allocating the earlier one because MySQL automatically drops the prepared statements when they are redefined or when we close the connection to the server. In other words, we can say that we can use the same name ... Read More

What is the similarity between prepared statements and MySQL user variables?

Published on 20-Feb-2018 15:28:00
As we know that MySQL user variables are specific to client connection within which they are used and exist only for the duration of that connection. When a connection ends, all its user variables are lost. Similarly, the prepared statements also exist only for the duration of the session in ... Read More

How can MySQL find and replace the data with REPLACE() function to UPDATE the table?

Samual Sam
Published on 20-Feb-2018 15:47:10
As we know that REPLACE () function is used to replace the occurrences of a substring with another substring within a string. We can also use REPLACE function with UPDATE statement to update the table by finding and replacing the data.Examplemysql> Update Student set Father_Name = REPLACE(Father_Name, 'Mr.', 'Shri '); ... Read More

How can I update a table using prepare statements?

Sravani S
Published on 20-Feb-2018 15:46:25
It can be understood with the help of following the example in which we have updated the table named ‘Student’, having the following data, by using prepared statement −mysql> Select * from Student; +------+-------+ | Id   | Name  | +------+-------+ | 1    | Ram   | | 2 ... Read More