I am new to shell-scripting and Impala both, and want to create an automated script that will update my dynamic target table based on a fixed source table.
update tgt set tgt.$col1 = 'some value 1', tgt.$col2 = 'some value 2' from $target_table tgt
inner join source_table src on tgt.$col3 = src.col where 'some condition';
I can declare variables as $1,$2... for these dynamic attributes but the situation is like it will be like sometimes there is need to update just one column, so how to deal with this situation?
Related
I have a nodejs app with SQL Server. I want to be able to update a table for a "specific org" based on an insert and delete action. Let's say I have 2 tables as follows:
Project: projId, orgId, projName
Tasks: taskId, projId, taskName
Users: userId, orgId, userName
OrganizationStats: numberOfProjects, numberOfUsers, numberOfTasks orgId
So let's say I add a new project for an organization where orgId = 1. My insert statement from Nodejs would be:
insert into project (projId, orgId, projName)
values (${'projId'}, ${'orgId'}, 'New Project');
I want to write a trigger in SQL Server that adds 1 to the numberOfProjects column with orgId that's passed in.
create trigger updateProjectAfterInsert
on project
after insert
as
begin
update OrganizationStats
set numprojects = numberOfProjects + 1
where orgId = 'THE_INSERTED_ORGID_VALUE';
end;
My problem is I don't know how to pass the ${'orgId'} to the trigger.
I'm going to expand on my comment here:
Personally, I recommend against storing values which can be calculated by an aggregate. If you need such information easily accessible, you're better off making a VIEW with the value in there, in my opinion.
What I mean by this is that NumProjects has "no right" being in the table OrganizationStats, instead it should be calculated at the time the information is needed. You can't use an aggregate function in a computed column's definition without a scalar function, and those can be quite slow. Instead I recommend creating a VIEW (or if you prefer table value function) to give you the information from the table:
CREATE VIEW dbo.vw_OrganisationStats AS
SELECT {Columns from OrganizationStats},
P.Projects AS NumProjects
FROM dbo.OrganizationStats OS
CROSS APPLY (SELECT COUNT(*) AS Projects
FROM dbo.Projects P
WHERE P.OrgID = OS.OrgID) P;
I use a CROSS APPLY with a subquery, as then you don't need a huge GROUP BY at the end.
I think what you want this something like this:
CREATE TRIGGER updateProjectAfterInsert
ON Project
AFTER INSERT
AS
BEGIN
UPDATE OrganizationStats
SET NumProjects = NumProjects + 1
WHERE OrgId IN (SELECT OrgId FROM inserted);
END;
Also note, Triggers must always assume multiple rows. It's possible to insert multiple rows, update multiple rows, and delete multiple rows. The "inserted" and "deleted" collections contain the data needed ("inserted" contains the rows being inserted, "deleted" contains the rows being deleted, and on an update "inserted" contains the values after the update, and "deleted" contains the values before the update).
I am creating a table in a function, so the function outputs a table to the assigned variable name as shown below
[name] = tablefunc(input1, input2)
The thing is I want to be able to have the name be an input that was assigned earlier for example
name = 'dogs'
[something] = tablefunc(input1,input2)
I want to be able to put some code where it says something so that the outputted table for tablefunc is assigned the variable name dogs
It might be confusing why I am doing this but it is because I am extracting tables from a txt file in a for loop so I am getting lots of tables generated and I want to be able to give the tables their appropriate names as opposed to just table1, table2 etc.
That's not a good idea. As an alternative, you should create a structure:
function t = tablefunc(input1,input2)
t = table(input1,input2);
end
name = 'dogs';
s = struct();
s.(name) = tablefunc(rand(2),rand(2));
You can have one field per txt file.
I have created a custom table and made it available on the Customers screen called 'Serial Tracking'. The purpose of this screen is to track serialised items that each customer is in possession of (regardless of who the item was purchased from).
I would like a record automatically added to the table on shipment release. I have attempted to customise the Release method of SoShipmentEntry but am having trouble getting all the required data together as well as the best way to structure the code.
The custom table DAC is
AUSerialTrack
Not necessarily the answer to your question but to long for a comment.
As an alternative, what if you set your Serials tab view to the Ship Line Split table without dealing with a custom table. You could get the information you needed with something like this: (need to convert to your BQL view for your serials tab)
SELECT [ship].[CustomerID],
[ship].[ShipmentNbr],
[split].[InventoryID],
[split].[LotSerialNbr]
FROM [dbo].[SOShipLineSplit] split
INNER JOIN [dbo].[SOShipLine] line
ON [line].[CompanyID] = [split].[CompanyID]
AND [line].[ShipmentNbr] = [split].[ShipmentNbr]
AND [line].[LineNbr] = [split].[LineNbr]
INNER JOIN [dbo].[SOShipment] ship
ON [ship].[CompanyID] = [split].[CompanyID]
AND [ship].[ShipmentNbr] = [split].[ShipmentNbr]
INNER JOIN [dbo].[InventoryItem] i
ON [i].[CompanyID] = [split].[CompanyID]
AND [i].[InventoryID] = [split].[InventoryID]
INNER JOIN [dbo].[INLotSerClass] c
ON [c].[CompanyID] = [i].[CompanyID]
AND [c].[LotSerClassID] = [i].[LotSerClassID]
WHERE [c].[LotSerTrack] = 'S'
AND [ship].[Confirmed] = 1;
Then when the user goes to the tab its always the current results. No custom code to fill in a custom table so easier for upgrades/customization maintenance.
Using the .Net data provider for postgresql, I would like to create an excel workbook that loads some tables from a given schema. The schema is set using a named range in the excel workbook, the table names are the same for each schema.
I tried the following:
Define a query "from other sources" / "blank query" named SchemaIdParam as
let
rng= Excel.CurrentWorkbook(){[Name="schemaid"]}[Content]
in
rng
(the name "schemaid" is defined in the workbook.)
Define a query "from PostgreSQL db" named mytable as
let
src = PostgreSQL.Database("xxx.myhost.com:5235", "my_database"),
tbl = src{[Schema=SchemaIdParam,Item="mytable"]}[Data]
in
tbl
Now this does not work. The error message states: "[Expression.Error]: no match between key and rows in table" (own translation). Yet it works if I replace SchemaIdParam by a literal value in quotation marks. Then the correct table is delivered.
Any hints how I can resolve this are very appreciated!
The reason why I want to use a named range for the schema name is that I want to programmatically, outside from excel, set the schema name. I am very open to suggestions how to do this in another way.
It could be a type error. Try converting the SchemaIdParam value to text as part of that query or else try
tbl = src{[Schema=Number.ToText(SchemaIdParam),Item="mytable"]}[Data]
After a lot of trying, I found the answer. I had a problem defining SchemaIdParam. A working definition is:
let
rng= Excel.CurrentWorkbook(){[Name="jobid"]}[Content],
value = rng{0}[Column1]
in
value
i.e., I had to reference a specific cell in the named range.
I'm trying to make a table of values inside hubot and he pass it's values to redis-brain.coffee but i just know a way: robot.brain.get("blablabla").
This will get a string from redis-brain and i need some kind of table.
How I'll use it:
At first call of this function, hubot will load the full database to the memory, then, if there's
robot.catchAll (msg) ->
if not quiet
text = msg.message.text
ector.setUser msg.message.user.name
if not loaded_brain
ector_brain = robot.brain.get('ector_brain') #need to be some type of table - In mysql should be like a select
ector.addEntry ector_brain
loaded_brain = true
else
ector.addEntry text
ector_brain = ector_brain+text #this line should insert the value of text inside ector_brain table. -- In mysql shoud be like an insert into
ector.linkNodesToLastSentence previousResponseNodes
response = ector.generateResponse()
previousResponseNodes = response.nodes
msg.reply response.sentence
So, how do I create a table in redis from hubot?
robot.brain.get and robot.brain.set operates with JSON objects, not only strings. Just place an object with your data structure of choice in the brain and get it back when necessary.