I need advices in order to make a process on my list of values. I have a table llx_societe and some fields where one of them is code_client. This field looks like :
0099
00100
00101
00102
...
00998
00999
001000
I want to remove the first zero for all values between 00100 and 00999 in order to get 0100 until 0999.
I wrote this command :
UPDATE `llx_societe`
SET `code_client`= SUBSTR(code_client,1)
WHERE `code_client` BETWEEN '00100' AND '00999';
But nothing, none lines are proceed.
Have you an explanation ?
SQL starts counting from 1 and not 0. Try this:
UPDATE `llx_societe`
SET `code_client`= SUBSTR(code_client,2)
WHERE `code_client` BETWEEN '00100' AND '00999';
Try this:
UPDATE llx_societe
SET code_client= SUBSTR(code_client, 2)
WHERE code_client between '00100' AND '00999'
MySQL SUBSTR() function
You can use the following SQL:
UPDATE TABLENAME SET data = SUBSTR(FIELD, 2);
for example if there is table(userinfo) and field is username
UPDATE users SET username = SUBSTR(username, 2);
Related
I want to add weight value to row 2. How do I do that? I tried to do the following but it gives me an error:
INSERT INTO name(member_id, weight) VALUES(2,55.6);
What is the mistake that I'm having?
If you're updating a specific row you need to use the UPDATE command
UPDATE talbename
SET weight =55.6
WHERE member_id = 2
You can use the UPDATE clause and use a WHERE condition to target a particular row -
UPDATE fromis_9
SET weight = 2
WHERE member_id = 2;
INSERT INTO clause is used for inserting new records.
To Update an existing record, UPDATE clause is used.
UPDATE fromis_9 SET weight = 55.6 WHERE member_id = 2;
Hi I think you should use INSERT INTO table
where condition(member.id=2)
please refer to https://www.w3schools.com/sql/sql_insert_into_select.asp
Its better to learn how to read documentation than wait for complete answer ;)
I have the table reservation and in that table there is a column called campground.
Every entry of the campground column is very similar to the other ones e.g.:
ALBE/Alberta Beach Family RV Park
Can someone tell me how to remove the first 5 characters of every entry in this column using a stored procedure which removes 5 characters from every entry in this column?
The code I've tried so far is the following:
UPDATE reservation
SET RIGHT(campground, LEN(campground) - 5)
Can someone help me creating a stored procedure with the functionality mentioned above?
Thanks!!
Do you really want to delete the first 5 characters of the string, or do you want to delete everything up to the first forward slash?
The other answers here address your literal question. This answers the question you might really be asking (PostgreSQL dialect):
select substr(campground,position('/' in campground)+1)
from (values
('ABC/American Bike Camp')
,('ALBE/Alberta Beach Family RV Park')) t(campground)
;
substr
------------------------------
American Bike Camp
Alberta Beach Family RV Park
(2 rows)
Using that expression in an update statement:
update reservation
set campground = substr(campground,position('/' in campground)+1)
where campground like '%/%'
;
(where clause included to ensure it doesn't update rows that have already been updated)
You can use the substring function with a starting position
select substring(campground from 6);
In MySQL you can use very simple query:
UPDATE reservation
SET campground = MID(campground, 6);
In PostgreSQL use substring instead mid:
UPDATE reservation
SET campground = substring(campground, 6);
Be careful, this query will change you source data, without rollback option.
You missed to give the column name in your set clause:
UPDATE reservation
SET campground = RIGHT(campground, LEN(campground) - 5)
I would just use substr(), which makes the expression simpler:
substr(campground, 6)
Both MySQL and Postgres support this syntax.
If you want an update query, then:
update reservation set campground = substr(campground, 6)
You can use split_part() in PostgreSQL
UPDATE reservation
SET campground = split_part(campground, '/', 2)
How to write the update query by using Arduino code in order to update (overwrite) the previous data in MYSQL.
Below is the example for FIXED VALUE QUERY. Its work well but how to change to variable value?
char UPDATE_SQL[] = "update [tableName] set [column_name] = [new_fixed_value] where [column_name] = [previous value] ;
update[database] it's wrong. It should be update[tableName]. For an example If I want to change in students table student sam's marks to 90 I can write as below
UPDATE students SET marks=90
WHERE name='sam'
Use sprintf to put your value into the string like this:
sprintf(UPDATE_SQL,"UPDATE students SET marks=%d WHERE name='%s'",
yourval,yourstrin);
I have the following MySQL statement:
$stmt = $conn->prepare('UPDATE `equipment` SET `currentHours`= :unitHours, `lastUpdate`= :lastUpdate WHERE `equipType`= :equipType AND `unitNumber`= :unitNumber');
$stmt ->execute(array(':lastUpdate'=> $dateToday, ':unitHours' => $unitHours, ':equipType'=> $equipType, ':unitNumber'=> $unitNumber));
I need to only update the currentHours if the value is equal to or greater than the value currently stored in that row. Is this possible with a MySQL statement or do I have to do it in PHP? I am new to programming so sorry in advance if this sounds like a simple question.
UPDATE `equipment` SET `currentHours`= :unitHours, `lastUpdate`= :lastUpdate
WHERE `equipType`= :equipType AND `unitNumber`= :unitNumber
AND
currentHours<:unitHours
The above updates only records with current hours lower than the input, it won't update all last update field that matches the rest of the condition.
If u want to update the field currenthours only when it is lower than the input, but update the lastupdate field regardless, then:
UPDATE `equipment`
SET `currentHours`= IF(currentHours<:unitHours,:unitHours,currentHours),
`lastUpdate`= :lastUpdate
WHERE `equipType`= :equipType AND `unitNumber`= :unitNumber
Wondered if someone could help me write a MySQL query. I noticed in my email database I have a huge amount of users who got past my automated entry checks who I want to flag. They are all of the form abcdef123#hotmail.com where abcdef are random names of variable length, then a 3 digit number.
I have a field in my table called fld_bad, which I want to change to 1 in the query.
So something like
UPDATE tbl_users SET fld_bad = "1" WHERE fld_email .....
Obviously the ..... is where my knowledge is failing me!
you can use the mysql regexp command to do this
http://dev.mysql.com/doc/refman/5.1/en/regexp.html#operator_regexp
UPDATE tbl_users SET fld_bad = "1" WHERE fld_email REGEXP '[A-Za-z]+[0-9]{3}#hotmail\\.com' = 1;
You can use:
UPDATE tbl_users
SET fld_bad = "1"
WHERE fld_email REGEXP '[[:alpha:]]+[[:digit]]{3}#hotmail\\.com'