How can I use LEFT and REPLACE on the same column in mysql?

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I want to select a column and remove(replace with space) any line feeds or carriage returns and I want to get only the first 40 characters in the column after the replace.

Here is the query I tried but I get

select date, REPLACE(LEFT(message, '\r', ' '), 30)
from table1 
where message like 'testing%'

ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near ' ' '), 30) from events_cleared where message like 'testing%' ' at line 1

You have the ordering of your arguments incorrect (you have passed the REPLACE arguments to LEFT). Try this:

select date, REPLACE(LEFT(message, 30), '\r', ' ')
from table1 
where message like 'testing%'

MySQL REPLACE() function, MySQL REPLACE() replaces all the occurrances of a substring within a find_string, A string which is present one or more times within the string str. from the table publisher for those rows, in which the column value of To find and replace 'Scott' with 'Sidhu' you can use the following MySQL statement : Example of MySQL LEFT() function with where clause . The following MySQL statement returns the pub_name(s) who belong to the USA and 5 characters from the left of those pub_name(s) from the publisher table. Code: SELECT pub_name,LEFT(pub_name,5) FROM publisher WHERE country='USA'; Sample table: publisher

Replace needs the arguments '\r; and ' '

LEFT(REPLACE(message, '\r', ' '), 30)

or

REPLACE(LEFT(message,30), '\r', ' ')

How to Use The MySQL REPLACE Statement to Insert or Update, You will learn how to use MySQL REPLACE statement to insert or update data. Insert a new row into the table, if a duplicate key error occurs. If the table does not have one of these indexes, the REPLACE works like an INSERT statement. LIMIT � IS NULL � Table & Column Aliases � Joins � INNER JOIN � LEFT JOIN� string functions ascii char_length character_length concat concat_ws field find_in_set format insert instr lcase left length locate lower lpad ltrim mid position repeat replace reverse right rpad rtrim space strcmp substr substring substring_index trim ucase upper numeric functions abs acos asin atan atan2 avg ceil ceiling cos cot count degrees

Your function identifiers are switched and therefore the number of arguments weren't right. if you want replace() to happen first is has to go deeper in the nesting than the left(). You also wrote 30 as second argument to left() which would give you only 30 characters, not 40.

SELECT date,
       left(replace(message, '\r', ' '), 40)
       FROM table1
       WHERE message LIKE 'testing%';

MySQL REPLACE String Function: Find & Replace Text, If you put the quotes to the field name like “field_name”, the query will update the content of that column to “field_name”, which is causing unexpected data loss. Then, REPLACE statement deleted the row with id 2 and inserted a new row with the same id 2 and population 3696820. Because no value is specified for the name column, it was set to NULL. Using MySQL REPLACE statement to update a row. The following illustrates how to use the REPLACE statement to update data:

MySQL REPLACE() Function, Well organized and easy to understand Web building tutorials with lots of examples of how to use HTML, CSS, JavaScript, SQL, PHP, Python, Bootstrap, Java� As you can see from the output, all occurrences of tea were replaced with coffee. B) Using REPLACE() function with table columns. In this example, we will use the sales.customers table from the sample database:

MySQL 8.0 Reference Manual :: 12.8 String Functions and , LPAD(), Return the string argument, left-padded with the specified string REGEXP_REPLACE(), Replace substrings matching regular expression For functions that take length arguments, noninteger arguments are rounded to the is a column of type SET , the FIND_IN_SET() function is optimized to use bit arithmetic. I recently needed to compare the content of two columns in a MySQL database that stored the large and small images for a blog post. All the small ones start with "small" followed by a number and the large ones "big" followed by a number. Enter the REPLACE() function to get rid of small/large and do the comparison! In this postI show how to use the replace function in MySQL.

MySQL 8.0 Reference Manual :: 13.2.9 REPLACE Statement, To use REPLACE , you must have both the INSERT and DELETE privileges for the It is possible for a single row to replace more than one old row if the table� We can use the CHARINDEX function to find the position of the space within the row programmatically. In this instance, the position is "7". Now we've found that we just need to display everything left of that position. We can "wrap" this up within a LEFT statement to do this (simple right?!).

Comments
  • Your solution worked, less on parenthesis at the end. select date, REPLACE(LEFT(message, 30), '\r', ' ') from table1 where message like 'testing%' THANK YOU ALL!
  • @MikePatterson sorry about that, bad cut & paste... I've edited.