my raw query look something like this-
UPDATE main,category,sub_category
SET main.biz_keyword = (category.category','sub_category.sub_cat_name','main.biz_keyword)
so the result something like main.biz_keyword='Doctor,General Physician,Physician'
I know this is wrong query but you got the Idea what I am looking for,
So my question is that I can do this by single query?
You might want to have a look at using CONCAT_WS(separator,str1,str2,...)
CONCAT_WS() stands for Concatenate With Separator and is a special
form of CONCAT(). The first argument is the separator for the rest of
the arguments. The separator is added between the strings to be
concatenated.
is this something you want to achieve?
Update TableName
set biz_keyword = category.category + ',' + sub_category.sub_cat_name + ',' + main.biz_keyword
Maybe you're looking for something like this?
UPDATE
main
SET
biz_keyword = CONCAT_WS(', ',
(SELECT category FROM category WHERE ... ),
(SELECT sub_cat_name FROM sub_category WHERE ... ),
biz_keyword)
Related
How to remove all spaces between a column field?. The spaces occur in the middle of the text so trim won't work and also replace is not working.
my code is
UPDATE temp_emp t1, master_employee t2
SET t1.lm= t2.emp_id
where REPLACE(t1.lm, ' ', '') = REPLACE(CONCAT(t2.first_name,'',t2.last_name), ' ', '');
for example when i run the query ,
select REPLACE(lm, ' ', '') AS concat from temp_emp1
i get the output as follows
concat
----------------------------------------
rick joe
james cole
albert Th
i want the output to be ;like this
concat
----------------------------------------
rickjoe
jamescole
albertTh
Without knowing the table structures and data, it is difficult for me to follow what you are doing. However, to accomplish the ouput of two concatenated columns is very straightforward.
Assume you have a table master_employee with just two columns and you want to output the FIRST and LAST names concatenated with no spaces in between. You simply use the function concat()for MySQL:
SELECT CONCAT(first_name, last_name)
from master_employee;
In Oracle, the concatenation is two pipes (||):
SELECT first_name || last_name
from master_employee;
Hope this helps.
If you want to update the existing column which has multiple spaces into one then this update query will be helpful:
UPDATE your_table SET column_that_you_want_to_change=
REGEXP_REPLACE(column_that_you_want_to_change, '[[:space:]]+', ' ');
If you don't want any spaces then this should work:
UPDATE your_table SET column_that_you_want_to_change=
REGEXP_REPLACE(column_that_you_want_to_change, '[[:space:]]+', '');
I have a field where I save strings, like:
"one two-tree"
"one-two-tree"
"one-two tree"
"one two tree"
When I do a SELECT, I want to retrieve strings that have either "-" or " " (space). Example:
When I do:
Select name from table where name="one two tree"
I want it to bring also results where there is either space or -, in this case returning all string exemplified above.
Is there a wildcard for this?
As far as standard SQL, you must use "or", or "like". depending on what exactly you want. EXAMPLE: Select name from table where name like "one?two?tree".
However, mySQL supports a REGEX extension that will give you what you want:
http://dev.mysql.com/doc/refman/5.7/en/pattern-matching.html
One option is to use replace:
select name
from yourtable
where replace(name, '-', ' ') = 'one two tree'
There is, but it is slow: you can use REGEXP:
SELECT name
FROM table
WHERE name REGEXP 'one[- ]two[- ]tree'
or you can use replacements:
SELECT name
FROM table
WHERE REPLACE(name, '-', ' ') = 'one two three'
but your best bet is to make an additional column where you will have a normalised name (with dashes always replaced with spaces, for example) so you can take advantage of indices.
You can use the LIKE condition with '%' (wildcard operator) for this.
e.g.
SELECT name from table_name WHERE name LIKE '%-%' OR name LIKE '% %'
-- will return all names that have `-` or ` `.
i have found some wrong text in 120 record in a table so i have in a varchar field:
'Name rubbish rubbish2 more rubbish'
i want to keep 'Name' en remove all after Name
i have tried this :
SELECT REPLACE(field_name, 'rubbish','') as test
from table
where field_name like '%rubbish%'
but this will ofcourse remove only 'rubbish' not the rest.
I think ther must be a way to remove everything after 5 digits!?
Txs
To remove everything after the first space character:
update mytable set
field_name = substr(field_name, 1, instr(field_name, ' '))
where field_name like '%rubbish%';
See SQLFiddle.
In MySQL, if you want to keep everything before the first space, then you can use substring_index():
update t
set col = substring_index(col, ' ', 1)
where col like '% %';
If you have some set pattern, such as the string 'rubbish', then you can use that. So, this keeps everything before "rubbish":
update t
set col = substring_index(col, 'rubbish', 1)
where col like '%rubbish%';
You can also use this logic in a SELECT statement:
select substring_index(col, 'rubbish', 1)
. . .
If the string does not contain "rubbish", then everything is returned.
Got ids stored in DB with Json format like this
'["1454","474","545"]'
I can build list IDs :
SELECT replace
(replace(
replace(
replace('["1454","474","545"]','[','\'')
,']','\'')
,'"','')
,',','\',\'')
mySql returns '1454','474','545'
But when I try to list DB records from this build list of IDs :
SELECT col FROM table WHERE col in (REPLACE
(REPLACE(
REPLACE(
REPLACE('["1454","474","545"]','[','\'')
,']','\'')
,'"','')
,',','\',\''));
mySql says "0 records" even if I add a "SELECT" before the first "REPLACE"
Any help ?
Try below query, you need to add select in your in clause also:
SELECT col FROM table WHERE col in (select REPLACE
(REPLACE(
REPLACE(
REPLACE('["1454","474","545"]','[','\'')
,']','\'')
,'"','')
,',','\',\''));
Alas, you cannot use in with a comma delimited string. It takes a list of elements, but not within a string. So, this works as you expect:
where x in (1,2,3)
This does not work as you expect (although it does work as I expect0;
where x in ('1,2,3')
This looks for one value of x that is the string '1,2,3'.
The solution is to use the MySQL function find_in_set():
SELECT col
FROM table
WHERE find_in_set(col, REPLACE(REPLACE(REPLACE('["1454","474","545"]', '[','\''
), ']', '\''
), '"', ''
), ',', '\',\''
);
To be honest, though, you might be better off with something like:
where '["1454","474","545"]' like concat('%;', col, '&%')
I have values stored like this in a field 1,255,230,265.
Is there a function in MySQL that will give me the second value in that string? In this case it'll be 255.
I tried using locate, but that does not seem to be meant for this.
Try this
select SUBSTRING_INDEX(SUBSTRING_INDEX(field_name,',',2),",",-1) from table_name
You might want to use SUBSTRING_INDEX() function.
SELECT SUBSTRING_INDEX(SUBSTRING_INDEX(field,',',2),',',-1)
FROM yourTable.
This grabs everything infront of the second comma, then grabs everything after the last comma (-1)
Try This
select * from Table1 where ',' + Nos+ ',' like '%,255,%'
Refer:
MySQL query finding values in a comma separated string
mysql check if numbers are in a comma separated list
Use FIND_IN_SET() function:
SELECT *
FROM tableA
WHERE FIND_IN_SET(255, columnName)
OR
Use LIKE operator
SELECT *
FROM tableA
WHERE CONCAT(',', columnName, ',') LIKE '%,255,%'