#SQL

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SQL is a standard language for storing, manipulating and retrieving data in relational databases.

Article
· Feb 13, 2023 4m read
When to use Columnar Storage

With InterSystems IRIS 2022.2, we introduced Columnar Storage as a new option for persisting your IRIS SQL tables that can boost your analytical queries by an order of magnitude. The capability is marked as experimental in 2022.2 and 2022.3, but will "graduate" to a fully supported production capability in the upcoming 2023.1 release.

The product documentation and this introductory video, already describe the differences between row storage, still the default on IRIS and used throughout our customer base, and columnar table storage and provide high-level guidance on choosing the appropriate storage layout for your use case. In this article, we'll elaborate on this subject and share some recommendations based on industry-practice modelling principles, internal testing, and feedback from Early Access Program participants.

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Is it possible to retrieve the SQL-Executing process ID (PID) from a process spawned from a UNION %PARALLEL? I have a value set in the SQL-Executing process that I need to replicate in the UNION %PARALLEL spawned process(es). The SQL-Executing process writes the value to a global subscripted by its PID so determining the SQL-Executing PID from the spawned process is what I need. I expected $ZPARENT from the spawned process would hold the SQL-Executing PID but the PID returned is different.

With thanks,

Michael Hill

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The last days I've work with the great new feature: LOAD DATA With this post I would like to share my first experiences with you. The following points do not contain any order or other evaluation. These are only things that I noticed when using the LOAD DATA command. It should also be noted that these points are based on the IRIS Version 2021.2.0.617 which is a preview release. So it may be that my observations do not apply to newer IRIS versions.

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Question
· Jan 30, 2023
SQL Query Help in $ListGet

Hi All,

I want to run an SQL like below

Select ID,Rollno,Marks,Name,Section,Teacher from Marks left outer join Student on Marks.StudentID=Student.ID

Now, the Student.ID is having the encrypted value which is not matching with Marks.StudentID (as this is clear value).

I can get the clear value using encrypted value as follow

^StoreValue("EncryptStudentID",Student.ID)=$LB("123"). That 123 is the clear Student.ID which I need to match in SQL query (ON clause).

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Question
· Jan 30, 2023
SQLComputed Code issue

Hi All,

I have a below query for which I need help.

I have a persistent class User.Cars.cls. The properties of this class is mapped through Global mapping with global (^CAR(Date,CarSerialno,Seq)).

Property CarNumber as %String (TRUNCATE=1) [SqlFieldName= CAR_Number];

Mapping of 5th Piece of ^CAR global to CarNumber property.

For e.g.^CAR(Date,CarSerialno,Seq)=1^2^3^4^BMW 4567^6^7

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Python has become the most used programming language in the world (source: https://www.tiobe.com/tiobe-index/) and SQL continues to lead the way as a database language. Wouldn't it be great for Python and SQL to work together to deliver new functionality that SQL alone cannot? After all, Python has more than 380,000 published libraries (source: https://pypi.org/) with very interesting capabilities to extend your SQL queries within Python.

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Hi All,

I am currently using D $SYSTEM.SQL.Shell() command or management portal to retrieve the data from database. I just learned we can also run cache table sql queries in MS access. MS access already installed on my machine.

I need to ask how I can connect my database of USER or sample namespace in MS access to run these SQL queries.

Thanks in advance!!

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Question
· Jan 24, 2023
SQL Query needs optimization

Hi All,

I am having an SQL query (mentioned below). When I am running this query it is taking 90 min to retrieve all records (approx 1 million records).

Fetching data from 5 tables using inner join in cache. Relative cost displaying 10 million

I wan to confirm How this query can be optimized

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Hi All,

I am a beginner in cache. I need to extract data from multiple tables (4-5) tables based on an SQL query . The data is more than 9 lakhs of records (i checked using count). The total number columns is 16.

When I am running this SQL query through management portal, I am getting time out exception. Could you please suggest how I can retrieve those records. Which way will be good (Dynamic query using %SQL.Statement or Embedded SQL (not known to me) or Writing to a global will help or not).

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Hi community,

I am working on Converting Non HL7 message (Using record maps) into HL7 message.

1.Can anyone share few details how to save Non HL7 message into SQL table and the converted HL7 message into SQL table

2.In Message Viewer is there any SQL tables are linked to the session id or where the information regarding the message will be stored? Will the message trace details are stored in globals or in SQL table,If yes can anyone share the details in which tables or globals will it be stored?

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Hello Team,

I need a help in the following error I am getting while running the SQL Query. I am running the SQL Query from different table using inner join. I run this everyday for last 90 days but for few days while extracting the data through this query I am getting this error. Please assist.

SQLException was thrown: Incorrect list format: 0 >= 0_SQLSTATE: S1000

SQLException was thrown: Incorrect list format: 0 >= 0_SQLSTATE: S1000

Error getting attributeColumn: Name

Error getting attributeColumn: Amount

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Hi everyone.

I have a use case where I'm using embedded SQL within a Business Process to interact with a SQL table. However, when it comes to deployment into our production, the table wont form part of the deployment package created from the production.

Beyond manually creating the table on the production system, is there a standard way of ensuring that a table needed for a class is created during deployment?

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Hi Developers,

Enjoy watching the new video on InterSystems Developers YouTube:

⏯ Importing Relational Data Using a DDL Script

https://www.youtube.com/embed/owUeiGtLixE
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Hello!

I'm new to the system I'm working on, and I have a part of a statement that needs to grab the previous month.

....and MONTH(TX3.date_of_service)= MONTH(dateadd(mm,-1,GETDATE()))

However, when it hits January, I'm left with month 0.

Does anyone know a workaround to grab December of the previous year, while still functioning normally for the rest of the current year.

Thank you!

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Article
· Jan 10, 2023 4m read
Columnar Storage in 2022.3

As you may well remember from Global Summit 2022 or the 2022.2 launch webinar, we're releasing an exciting new capability for including in your analytics solutions on InterSystems IRIS. Columnar Storage introduces an alternative way of storing your SQL table data that offers an order-of-magnitude speedup for analytical queries. First released as an experimental feature in 2022.2, the latest 2022.3 Developer Preview includes a bunch of updates we thought were worth a quick post here.

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Date range queries going too slow for you? SQL Performance got you down? I have one weird trick that might just help you out! (SQL Developers hate this!)*

If you have a class that records timestamps when the data is added, then that data will be in sequence with your IDKEY values - that is, TimeStamp1 < TimeStamp2 if and only if ID1 < ID2 for all IDs and TimeStamp values in table - then you can use this knowledge to increase performance for queries against TimeStamp ranges. Consider the following table:

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I have table

CREATE TABLE nodes (
        name VARCHAR(50) NOT NULL, 
        parent VARCHAR(50), 
        PRIMARY KEY (name), 
        FOREIGN KEY(parent) REFERENCES nodes (name) ON UPDATE cascade
);

I put some data

INSERT INTO nodes (name, parent) VALUES ('n1', NULL);
INSERT INTO nodes (name, parent) VALUES ('n11', 'n1');
INSERT INTO nodes (name, parent) VALUES ('n12', 'n1');
INSERT INTO nodes (name, parent) VALUES ('n13', 'n1');

Let's delete all

DELETE FROM nodes;

Nope, no way.

SQL Error [124] [S1000]: [SQLCODE: <-124>:<FOREIGN KEY constraint failed referential check upon DELETE of row in referenced table>]
[Location: <ServerLoop>]
[%msg: <At least 1 Row exists in table 'SQLUser.nodes' which references key 'NODESPKey2' - Foreign Key Constraint 'NODESFKey3', Field(s) 'parent' failed on referential action of NO ACTION>]

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I am trying to migrate our SQL Connections from HealthShare Health Connect 2018.1.3 to IRIS HealthShare Health Connect 2022.2 using the Data Export/Import Wizard through the Management Portal. I am able to export the data fine, but I am running into issues trying to Import it into 2022.2 using the Data Import Wizard. When I run through the steps it is not importing everything from the txt file I created from 2018.1.3. I would rather not have to rekey all the connections if possible.

Here is the Background Task Error Log

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Hi,

I tried to join my local DB table with link table. but I am getting below error.

5475 5475 reporterr2+40^%occRoutine Error #5475: Error compiling routine: %sqlcq.HSANALYTICS.cls483. Errors: %sqlcq.HSANALYTICS.cls483.cls(%OnNew+5) : SQLCODE=-161 : References to an SQL connection must constitute a whole subquery

I tried to execute below query in Managementportal

select dg.ID from HSAA.Diagnosis dg
left join LinkTableData.FacilityFullList la on dg.ID=la .ID

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I have a table, with autoincremented id

CREATE TABLE users (
    id SERIAL NOT NULL,
    name VARCHAR(30) NOT NULL,
    PRIMARY KEY (id)
)

I can add a new item there with an explicit id 

INSERT INTO users (id, name) VALUES (2, 'fred')

And while my id is autoincremented, I can omit it

INSERT INTO users (name) VALUES ('ed')

So, this time, I don't know the id, and I want to somehow get it.

I could do it with LAST_IDENTITY() function, but it just uses %RowID, and have no relation to the primary id

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Hi Developers,

Enjoy watching the new video on InterSystems Developers YouTube:

⏯ InterSystems IRIS Cloud SQL @ Global Summit 2022

https://www.youtube.com/embed/QLaAH5o60y0
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