What is the meaning of % and _ in the LIKE statement in MYSQL?

Question

I am trying to find a way, how I can look for one row in a table with a search for the id, but then I use this to give me the INSERT statement (which creates this row again)

What I am trying to do, is get an audit where any update - checks the state of a row, saves it as its INSERT statement and saves this to an audit file.

Answer 1

The LIKE operator is used in a WHERE clause to search for a specified pattern in a column.

There are two wildcards used in conjunction with the LIKE operator:

% - The percent sign represents zero, one, or multiple characters

_ - The underscore represents a single character

Note: MS Access uses a question mark (?) instead of the underscore (_).

The percent sign and the underscore can also be used in combinations!

LIKE Syntax

SELECT column1, column2, ...
FROM table_name
WHERE columnN LIKE pattern;

Tip: You can also combine any number of conditions using AND or OR operators.

Here are some examples showing different LIKE operators with '%' and '_' wildcards:

LIKE Operator Description
WHERE CustomerName LIKE 'a%' Finds any values that starts with "a"
WHERE CustomerName LIKE '%a' Finds any values that ends with "a"
WHERE CustomerName LIKE '%or%' Finds any values that have "or" in any position
WHERE CustomerName LIKE '_r%' Finds any values that have "r" in the second position
WHERE CustomerName LIKE 'a_%_%' Finds any values that starts with "a" and are at least 3 characters in length
WHERE ContactName LIKE 'a%o' Finds any values that starts with "a" and ends with "o"

Answer 2

Hello,

The LIKE operator is used in where clause to find specific pattern in column.

there are tow wildcard used with LIKE operator is following :
% - the percentage sign represent zero,one or multiple characters.
_ - the underscore sign represent a single characters.

Syntax:

SELECT column1, column2, ...
FROM table_name
WHERE columnN LIKE pattern;