If we execute the below like query in MySQL, then the result will be as follows:
#Mysql update update
Update Books set PRICE = '2000' where BOOKID = 107 UPDATE Books2 SET BOOKNAME = REPLACE(BOOKNAME,'Networking','Computer Network')
Replace string using Column name of a table and SELECT StatementĬonsidering a sample table named Books, we will use MySQL REPLACE function in the query to show the string exchange of column values having the substring within it.įor example, taking the sample table Person, we perform the below query: Let us suppose the below query to replace certain number string:Ĥ. We are replacing the word ‘Learnint’ and correcting it’s a spelling error with ‘g’ substring and removing‘t’.ģ. Correcting invalid String character within a word Let us take a basic example for using MySQL REPLACE function: We will execute the below queries which show various ways to use this MySQL REPLACE string function in a database table: 1. This means if we want to substitute any text string using a certain pattern then, we need to use user-defined MySQL function i.e. Note that MySQL REPLACE function will make logical sense only there exists a Primary Key or a Unique key in the table database so that the function can determine a new row without going through duplicity to make a replacement using indexes of the table otherwise it will be corresponding to an INSERT statement.Īlso, learn that this function does not upkeep regular expression. This will cause a sudden data loss of that column in the table. We should know that if we apply quotes with the field column in the function like ‘Person_Address’, then, as a result, the values of that column will be updated by this ‘Person_Address’. For the function, the first parameter defines the specified column name without quotes and the other two denote the substrings which are responsible to replace each other with one another to produce a new string. This above helps to find all the occurrences of a spelling error in the column of the address of the table person and updates it with the correct one.
UPDATE Person SET Person_Address = REPLACE(Person_Address,’Jaiput’,’Jaipur’) In this way, for a column value replacement, let us take the statement as follows: Thus, using the REPLACE function in MySQL we can work to handle any spelling mistakes found in the columns or if we want to search the words that may not be correct or false and then, want to replace some characters with the effective one so that we get the updated records. The function executes to replace all the occurrences of the second argument in a specified string using the desired new one. As per the above query, we see that the valid expression is specified to perform replacement from old string to new in the main string.
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