How can I make a MySQL query asking for all the string fields in a column that have a particular length?
Thanks!
Use LENGTH() for checking length in bytes:
SELECT str FROM sometable WHERE LENGTH(str) = 5;
Or CHAR_LENGTH() for checking length in number of characters (useful for multi-byte strings):
SELECT str FROM sometable WHERE CHAR_LENGTH(str) = 5;
select *
from myTable
where length(myColumn) = 5
Related
I am trying to accomplish the following sql statement
the expected result are only image_url having 0 value
SELECT product_id,image_url FROM tour_product where image_url = 0
but i am getting all rows shows in below image
can any one help me why this happen.
Your image_url field data type is string so its not accept number so your use single quote ' '.
like
SELECT product_id, image_url FROM tour_product WHERE image_url = '0'
You are comparing a string to an integer. So, what is MySQL to do?
It does something you might not expect. It converts the string to an integer. It does so by converting leading characters. If there are no leading digits, the value is zero.
Moral? Don't mix types. The logic would be:
where image_url = '0'
Or more likely, you want something like:
where image_url <> ''
Try This
for this You are looking for CHAR_LENGTH() to get the number of characters in a string.
SELECT product_id,image_url FROM tour_product where CHAR_LENGTH (image_url) = 0
OR
for this get all zero value
SELECT product_id,image_url FROM tour_product where CHAR_LENGTH (image_url) = '0';
SELECT * FROM table ORDER BY string_length(column);
Is there a MySQL function to do this (of course instead of string_length)?
You are looking for CHAR_LENGTH() to get the number of characters in a string.
For multi-byte charsets LENGTH() will give you the number of bytes the string occupies, while CHAR_LENGTH() will return the number of characters.
SELECT * FROM table
ORDER BY LENGTH(column);
Documentation on the LENGTH() function, as well as all the other string functions, is available here.
Having a look at MySQL documentation for the string functions, we can also use CHAR_LENGTH() and CHARACTER_LENGTH() as well.
In my case I get data using mobile number length greater than 10 digits using the below query
SELECT * FROM table_name WHERE CHAR_LENGTH(mobile) > 10;
The function that I use to find the length of the string is length, used as follows:
SELECT * FROM table ORDER BY length(column);
I used this sentences to filter
SELECT table.field1, table.field2 FROM table WHERE length(field) > 10;
you can change 10 for other number that you want to filter.
select * from *tablename* where 1 having length(*fieldname*)=*fieldlength*
Example if you want to select from customer the entry's with a name shorter then 2 chars.
select * from customer where 1 **having length(name)<2**
I need to write a query for finding the length of the word between value1 and value2. I tried the query below:
select * from table_name where LENGTH (column_name (BETWEEN 1 and 2) );
You can do it like this:
SELECT *
FROM table_name
WHERE LENGTH (column_name) BETWEEN 1 and 2;
The following will select all rows where col_name has a length between 1 and 5:
SELECT table_name.*,
LENGTH(col_name) AS len
FROM table_name
HAVING len
BETWEEN( 1 AND 5 );
You could also use CHAR_LENGTH() or CHARACTER_LENGTH() if needed. Please note that LENGTH() will give you the number of bytes the string occupies (when using multi-byte charsets at least).
Be sure you absolutely need EVERYTHING (i.e. *) from the table, though -- that's very rarely the case.
I have a MySQL table which contains comma-separated values like this:
first row=(3,56,78,12)
second row=(6,44,2,3)
third row=(67,4,2,7,1)
fourth row=(88,55,22,33)
fifth row=(88,55,3,1,5)
I want to select the rows which have 3 in their set. How can I do this?
Try:
SELECT * FROM TABLE_NAME WHERE FIND_IN_SET( 3, COLUMN_NAME )
How about something like
SELECT *
FROM Table
WHERE Field LIKE '3,%'
OR Field LIKE '%,3'
OR Field LIKE '%,3,%'
OR Field = '3'
Just Use Mysql Function FIND_IN_SET(str,strlist) .
Returns a value in the range of 1 to N if the string str is in the string list strlist consisting of N substrings. A string list is a string composed of substrings separated by “,” characters. If the first argument is a constant string and the second is a column of type SET, the FIND_IN_SET() function is optimized to use bit arithmetic. Returns 0 if str is not in strlist or if strlist is the empty string. Returns NULL if either argument is NULL. This function does not work properly if the first argument contains a comma (“,”) character.
SELECT * FROM table_name WHERE FIND_IN_SET('3', column_name);
use this condition
WHERE firstrow LIKE '3,%'
OR firstrow like '%,3'
OR firstrow like '3'
SELECT *
FROM Table
WHERE Field IN ($first_row)
OR Field IN ($second_row)
OR Field IN ($third_row)
OR Field IN ($fourth_row);
you can use IN statement in your query.Please try this.
SELECT *
FROM Table
WHERE Field IN ($first_row)
OR Field IN ($second_row)
OR Field IN ($third_row)
OR Field IN ($fourth_row);
Is there any function like "strlen" in mysql?
Mysql does have a length function to return the length of a string.
so you could do something like.
select * from some_table where length(some_string) > 0;
You can do it with using LENGTH keyword
SELECT * FROM table WHERE LENGTH (name) > 150;
How to select one text column, which string length >0 ?
You could compare to the empty string:
SELECT yourcolumn
FROM yourtable
WHERE yourcolumn <> ''
The following query would do the job for you.
select length(your_text_column) from sample_table where length(some_column) > 0
For anyone who comes across this answer in Google, keep this in mind:
Actually, CHAR_LENGTH() should be a better choice. For multi-byte charsets LENGTH() will give you the number of bytes the string occupies, while CHAR_LENGTH() will return the number of characters
MySQL - How to select data by string length