Need help in executing a query over a customer database on a field named phone.
select * from customers where phone REGEXP '123456|565834'
I need a way to select the matched portion of regex matched in select clause.
The final results should be something like
Name Matched Phone
Naveen 123456 12345678
Naveen2 123456 123456789
Arun 565834 9565834
Arun2 565834 10565834
P.S. This has to be one query and there is no other unique key to be grouped by with
Use INSTR function of MySQL.
Ex. INSTR(regex, phone)
SELECT SUBSTRING('123456|565834',INSTR('123456|565834',phone),10)
FROM customers
WHERE phone REGEXP '123456|565834';
Doc: INSTR function
You may use a CASE expression here:
SELECT
Name,
CASE WHEN Phone REGEXP '123456' THEN '123456'
WHEN Phone REGEXP '565834' THEN '565834' END AS Matched,
Phone
FROM customers
WHERE
phone REGEXP '123456|565834';
Note that you don't necessarily need to use REGEXP in this case, LIKE probably would have sufficed. But using REGEXP is easier to read IMO, and also it lets you handle more complex logic, should you need to in the future.
If you're not constrained to only use mysql, then may try with shell script + mysql to pass the map values and search - Not sure understood the requirement correctly.
search="5672C";
mysql <connection details> -e "select fields, \"$search\" as matched from customers where phone like \"%$search%\";"
We can loop the map strings and achieve.
Related
I have a field called EMAIL_ADDRESS. One of the records would be:
john#gmail.com, mike#gmail.com, joe#yahoo.com, george#yahoo.com, fred#gmail.com
I wan to remove all yahoo addresses in my SELECT query to get:
john#gmail.com, mike#gmail.com, fred#gmail.com
If I use
REPLACE(SM.SCORECARD_EMAIL_ADDRESS, 'joe#yahoo.com,', '')
this works.
If I want to remove ALL yahoo email addresses this doesn't work:
REPLACE(SM.SCORECARD_EMAIL_ADDRESS, '%#yahoo.com,', '')
because wildcards don't seem to work as it's looking for % in the string.
You should probably fix your table design and stop storing CSV lists of email addresses. Instead, get each email onto a separate record. As a short term fix, if you're running MySQL 8+, you may use REGEXP_REPLACE():
UPDATE yourTable
SET EMAIL_ADDRESS = REGEXP_REPLACE(
REGEXP_REPLACE(EMAIL_ADDRESS, '(, )?\\S+#yahoo\\.com,?', ','), '^,+|,+$', '')
WHERE EMAIL_ADDRESS LIKE '%#yahoo.com%';
If you don't need to udpate records but you want them only in the SELECT query you can use NOT LIKE operator
SELECT * FROM your_table WHERE email NOT LIKE '%yahoo.com'
So you get records that doesn’t match the like pattern
I am a beginner so please help me.
There are 2 things you need to combine in this case.
Because you didn't provide enough information in your question we have to guess what you mean by name. I'm going to assume that you have a single name column, but that would be unusual.
With strings, to match a character column that is not an exact match, you need to use LIKE which allows for wildcards.
You also need to negate the match, or in other words show things that are NOT (something).
First to match names that START with 'A'.
SELECT * FROM table_name WHERE name LIKE 'A%';
This should get you all the PEOPLE who have names that "Start with A".
Some databases are case sensitive. I'm not going to deal with that issue. If you were using MySQL that is not an issue. Case sensitivity is not universal. In some RDBMS like Oracle you have to take some steps to deal with mixed case in a column.
Now to deal with what you actually want, which is NOT (starting with A).
SELECT * FROM table_name WHERE name NOT LIKE 'A%';
your question should have more detail however you can use the substr function
SELECT name FROM yourtable
WHERE SUBSTR(name,1,1) <> 'A'
complete list of mysql string functions here
mysql docs
NOT REGXP operator
MySQL NOT REGXP is used to perform a pattern match of a string expression expr against a pattern pat. The pattern can be an extended regular expression.
Syntax:
expr NOT REGEXP pat
Query:
SELECT * FROM emp_table WHERE emp_name NOT REGEXP '^[a]';
or
SELECT * FROM emp_table WHERE emp_name NOT REGEXP '^a';
I Have a string foo = "a,b". Now I want to search in the mysql database to get user_id while comparing the string to the likes field. The likes field has data in the format interest => a c v d b.
The different characters are seperated by a space. I tried Using like but the result was not upto the mark. How can I go about it?
This is my code
select user_id from users where interest like %foo%;
MySql does not support multiple keyword search in set like field, you should add OR condition of each search keyword with REGEXP
if your format interest like=> a,c,v,d,b then you can use FIND_IN_SET() function otherwise REGEXP provide to exact search.
SELECT user_id FROM users
WHERE interest REGEXP '[[:<:]]a[[:>:]]' AND interest REGEXP '[[:<:]]b[[:>:]]'
this query search only a and b in field not aa, bbax
LIKE does not support exact search.
There is table named Students. I want to extract the names of students whose name starts with either 'n' or 'p' or 'y'. I know that in TSQL (MS SQL server) I can write the query as follows and it works:
SELECT * FROM Students WHERE StudentName LIKE '[npy]%'
But when I execute the same query in MySQL (phpmyadmin) I was unable to retrieve the correct result set. I tried converting the letters of the student name into the same case which is mentioned in the charlist. I did bit of googling and found out that in MySQL we need to specify this as a regular expression. I executed the below query and got the expected result.
SELECT * FROM Students WHERE StudentName REGEXP '[[:<:]]n | [[:<:]]p | [[:<:]]y'
I want to know the reason why LIKE '[charlist]%' syntax is not working with MySQL. Is it due to the implementation in MySQL (MySQL doesn't support the syntax) or something wrong with the phpmyadmin version I'm using?
Any help regarding this is highly appreciated. Thanks :)
There is an even shorter way to write your query:
SELECT * FROM Students WHERE StudentName REGEXP '^[npy]'
And if you're concerned about being case sensitive:
SELECT * FROM Students WHERE StudentName REGEXP BINARY '^[npy]'
In MySQL, a REGEXP pattern match succeeds anywhere in the value, which differs from LIKE where the pattern must match the entire value.
The following link will give you a more complete answer:
MySQL Pattern Matching
MySQL :
Case insensitive: SELECT * FROM Students WHERE StudentName RLIKE '^[npy]' ;
Case sensitive : SELECT * FROM Students WHERE StudentName CAST(RLIKE as BINARY) '^[npy]' ;
I have a mysql database with a table that contains an email address entered by website users.
How would I select all records where the email field contains any number of characters, then 3 numbers and #yahoo.com
i.e. testemail639#yahoo.com
A simple way would be to use REGEXP in your SELECT statements.
SELECT * FROM records WHERE email REGEXP '^\w+\d{3}\#.*$'
The above statement is untested, but should lead you down a better road.
SELECT * FROM table WHERE email REGEXP '[0-9]{3}#yahoo\.com'
Try this
SELECT * FROM records WHERE email REGEXP '^\w+([\.-]?\w+)?([0-9]{3})#\w+([\.-]?\w+)*(\.\w{2,4})+$'
^\w+([\.-]?\w+)?([0-9]{3})#\w+([\.-]?\w+)*(\.\w{2,4})+$ strictly checks string followed by 3 numbers pattern in the email containing no spaces