I'm new and don't have much experience in database. I've a front end GUI flex application and saves user interactions to MySQL database.
Database will have fields like this.
ID Name ChartName SequenceOfActions rest--of--fields
I want to update the database whenever the user makes GUI change or interacts. I know the update command but it will delete older value and update.
I want something like append command which will save the values in the database.
Are you looking for CONCAT? Something like:
UPDATE my_table SET my_field = CONCAT(my_field, 'New content');
Related
Is is possible to update data or insert data from grafana to mysql. I have a requirement to insert/update information in mysql using a UI. Now I am already using grafana so wanted to know if there is any way we can use grafana to update or insert information
There is no input panel for taking user input and inserting that data to MySQL or any other. (Grafana v7.0)
For very minimalist input data you can use grafana variables as a hack.
Create example table for storing input in MySQL
CREATE TABLE `grafana_variable` (`variable` VARCHAR(64)) ENGINE = InnoDb;
In Grafana dashboard click settings icon:
then click:
add variable:
return to dashboard and you should see at the top:
create a new visualization panel or add another query in any already existing panel and add SQL query:
INSERT INTO `grafana_variable` VALUES ('${myvar}');
now every time you type into that field
and click away from it or use ie tab key the data will be inserted to the MySQL database.
mysql> select * from grafana_variable;
+---------------------+
| variable |
+---------------------+
| this is just a test |
+---------------------+
1 row in set (0.08 sec)
The downside of this hack is that the visualization tile will have in its upper left corner error icon:
with information (when you hover over it):
Found no column named time or time_sec
because the sql query of the visualization tile is inserting data instead of selecting it from database therefore there is no time or time_sec data.
Grafana also does not handle multiple MySQL statements so you cannot repair that by adding before or after the INSERT INTO ... statement second one with SELECT FROM. Maybe this could be somehow patched by using sub queries or something similar but I did not investigate that further.
Because the error as above can be due to multiple reasons not related to the hack it will be better to use the hack query in separate visualization tile - the one that you will remember (or even give descriptive panel tile) so you know that the error there is nothing unusual.
See grafana varialbes for more info about variables.
There is also useful list of already existing variables you can use same way as myvar I created. See section MACROS here For eg:
$__timeFrom()
and
$__timeTo()
have the start and the end of displayed time range.
Permissions and Security
The whole hack works because the MySQL user that grafana uses is allowed to execute INSERT statement, but if grafana is able to execute ANY statement then make sure that MySQL user that grafana uses is not allowed for example to execute statements like DROP ... or any other that is not related to INSERT data into the grafana_variable table as in example.
If you use MySQL as datasource for displaying data the grafana user should also be able to execute SELECT statements.
But nothing else than that.
Read about MySQL user premissions
Must hide Update as temporary table
I am working with postgres and Grafana. Probably it is quite similar.
With postgres you have to hide the update like this:
WITH UPDAT_TEMP AS (UPDATE MyTable SET MY_ROW='MY_TEXT' WHERE ID=99)
SELECT 1;
If you want to update various rows, you have to put various temporary tables.
The
Update my_table (rows) values(...)
does not work for me under Grafana.
Therefore:
WITH UPDAT_TEMP AS (UPDATE MyTable SET MY_ROW='MY_TEXT' WHERE ID=99),
WITH UPDAT_TEMP2 AS (UPDATE MyTable SET MY_ROW2='MY_TEXT2' WHERE ID=99)
SELECT 1;
Is this the right syntax:
INSERT INTO stock (Image)
SELECT Image,
FROM productimages
WHERE stock.Name_of_item = productimages.number;
SQL Server Management Studio's "Import Data" task (right-click on the DB name, then tasks) will do most of this for you. Run it from the database you want to copy the data into.
If the tables don't exist it will create them for you, but you'll probably have to recreate any indexes and such. If the tables do exist, it will append the new data by default but you can adjust that (edit mappings) so it will delete all existing data.
I use this all the time and it works fairly well.
INSERT INTO bar..tblFoobar( *fieldlist* )
SELECT *fieldlist* FROM foo..tblFoobar
This just moves the data. If you want to move the table definition (and other attributes such as permissions and indexes), you'll have to do something else.
The query logic that you are trying appears to be not correct (the query itself is buggy).
Assuming you have the correct query for the above logic and what you are trying is to insert new rows into the table stock by selecting a column from productimages table with a matching record as stock.Name_of_item = productimages.number
The above logic will add redundant data in to the table.
You perhaps looking to update instead of insert, something as -
update stock s
join productimages p on p.number = s.Name_of_item
set s.Image = p.Image
I have the following query which pulls 1000 rows of data:
select barcode, type from collections where user = 'myusername'
I need to move this data to my new collectors_collections table. The user column is now labeled username.
What is the quickest way to do this? A query of some kind or some other way? I am using the latest MySQL Workbench.
You could try running this query:
INSERT INTO
collectors_collections(barcode, type, username)
SELECT
barcode,
type,
`user`
FROM
collections
WHERE
`user` = 'myusername';
Well, a simplistic approach which I would use it to just cut and paste the results of your selection into a text editor. And perform some simple search/replaces to create insert statements for your new table. Then just paste the new insert statements into your mysql client.
I assume you are not wanting this functionality with a running program.
I currently have a large user database where every user has a unique password. All the passwords are md5 encrypted. The way I originally set it up was by converting the list of user details to SQL by saving the excel sheet I had as a CSV, and then converting that to SQL at csv2sql.com. I then used sql to create the unique passwords with the following command line:
UPDATE users SET numbers = SUBSTRING(MD5(RAND()) FROM 1 FOR 10)
To make sure this command didn't generate duplicates I made the password field a UNIQUE field. I then exported this table so I had a copy of all the original passwords. Once exported I then encrypted the list to md5 using the following command line:
UPDATE users SET `password` = MD5(`password`)
This all worked fine, albeit not the most efficient way of dealing with it.
Now I have to add a whole load more users to the database. Of course I have to maintain the original passwords from the original users. I'm able to insert the new users, but I'm unsure how I'm going to create the new passwords for them without changing all the previous ones. Can someone point me in the right direction please!
You could import your csv into a temporary table, do your modifications there, and then insert into users (...) select ... from temp_users
You could add a column 'unencrypted password' to your user table, import the csv, so that the unencrypted pw is in that column, and then run update users set password = md5(unencrypted_password) where unencrypted_password is not null
You could use a different csv-sql-converter. As a hack, i often imported the csv into excel/oo-calc, and made a column like this: =concat('insert into table (...) values (', A1, ', ', A2, ')');, which allowed me to do custom sql-statements
I have a filemaker script that inserts a new entry on several imported mySQL tables. I need to get the unique id of these entries as they are created (before or after, either way) so I can refer to them later in the script. This is easy to do in SQL with LAST_INSERT_ID(), but I can't seem to find how in filemaker.
What I have tried that didn't work:
GetNextSerialValue ( Get ( FileName )&".fp7" ; "jos_users::id" ) #returns nothing, does not work properly on ODBC tables
Get(RecordID) #Local value does not correspond to the mySQL unique ID
Thanks in advance! Any suggestions are appreciated.
How are you creating the records in your MySQL table? Are you using FileMaker's ESS and native "New Record" command to insert the new record or are you using the Execute SQL[] script step? Or something different?
The next serial value and recordID values are FMP-specific and don't apply here (unless your MySQL primary key is a serial value managed by FMP).
With "New Record" FileMaker sets your record context to the new record. So if your "jos_users" table occurrence is an alias to the MySQL table, calling "New Record" will place you in the context of that record. You can then set a variable to the contents in the "id" column.
Go To Layout ["jos_users" (jos_users)]
New Record/Request
Commit Records/Requests[No dialog]
Set Variable [$lastInsertID; jos_users::id]
This presumes that your MySQL record is given a proper ID at record insertion time and that the record can be committed passing any validation checks you've applied.
If you're creating the records using some other process, let us know and we can advise you on how to get the value.