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8 Ιουλ 2015 · How do I check if a string in a MySQL field contains a number then delete them? Example table: tbl_tags ----- | id | tag | ----- | 1 | hello | | 2 | hello2 | | 3 | 2hello | | 4 | hel3lo | ----- The only way I can think of is to do each number individually and use LIKE '%1%' OR LIKE '%2%' etc. But there must be an easier way?
12 Δεκ 2021 · MySQL doesn’t have a built-in function to check if a string value is a valid number or not. To determine if a string is numeric, you need to write your own solution. One way to check if a string is numeric is by writing a regular expression using the REGEXP operator.
12 Φεβ 2024 · One effective method to check if a particular string occurs in a MySQL table is by utilizing the SELECT statement along with the LOCATE() function. The LOCATE() function in MySQL is employed to find the position of the first occurrence of a substring within a given string.
30 Ιουλ 2019 · To check a string contains numbers, you can use regexp i.e. Regular Expressions. The syntax is as follows − SELECT *FROM yourTableName where yourColumnName REGEXP ‘[0-9]’;
29 Ιαν 2016 · This is the technique that I use to detect if a string contains a number: select LAST_NAME, 'contains a number'. FROM names. where translate(LAST_NAME, '0123456789', '') <> LAST_NAME. That works by translating the digits to empty string.
To check if a string contains a substring, you can use the percentage ( %) wildcard at the beginning and the end of the substring. For example, the following query uses the LIKE operator to find all employees whose last names contain the substring on:
EXPORT_SET(bits, on, off [, separator [, number_of_bits]]) Returns a string such that for every bit set in the value bits, you get an on string and for every bit not set in the value, you get an off string. Bits in bits are examined from right to left (from low-order to high-order bits).
