This article is a case study on writing a complex query on an SQL database. We start with a set of database tables, populated with data. We then have a requirement to show some data by writing a query. We’ll write the query step-by-step and get to our final result. You’ll see...
Connecting procedures to patients is an important aspect of healthcare. The following SQL example query demonstrates how to use FHIRPatientandProcedureresource types to accomplish this. The following SQL query will return all patients and their related procedures found in your HealthLake data store. ...
The folloiwng examples demonstrate how to use Amazon Athena SQL queries with complex filtering to locate FHIR data from a HealthLake data store.
The Complex Parameter Type Cookbook example shows how to use Liquid Data to create an integrated view that connects two enterprise information systems: a database and an in-flight XML data source using a complex parameter type (CPT). A query that uses both data sources determines whether the c...
Use the SQL editor in IBM® Data Server Manager (DSM) to run a complex query. About this task This complex query has common table expressions, aggregate functions, and a ranking function to rank products based on quantity sold online and quantity sold in stores. ...
EF Core also translates queries where an aggregate operator on the grouping appears in a Where or OrderBy (or other ordering) LINQ operator. It usesHAVINGclause in SQL for the where clause. The part of the query before applying the GroupBy operator can be any complex query as long as it ...
query using CROSS APPLY EXPLODE@result=SELECTEmpName, r.key.Trim()ASPhoneType, r.valueASPhoneNumberFROM@mapCROSSAPPLYEXPLODE(PhoneNumberMap)ASr(key, value);OUTPUT@resultTO"/Output/ReferenceGuide/Concepts/TypesAndLiterals/BuiltIn/Complex/SQL_MAP/ExampleA.csv"USINGOutputters.Csv(outputHeader: true)...
Example 5: Escape a JSON string. Sample statement: set odps.sql.udf.getjsonobj.new=true; -- The return value is "1". select get_json_object('{"a":"\\"1\\"","b":"2"}', '$.a'); -- The return value is '1'. select get_json_object('{"a":"\'1\'","b":"2"}',...
In the following example, an open connection to the AdventureWorks2022 sample database is passed in to the function, a complex statement is constructed that combines a stored procedure call with a SQL statement, the statements are run, and then a do loop is used to process all the result ...
Db2 Big SQL supports complex types, such as array-of-rows and map-of-rows, and you can use these complex data types with JSON data. JSON data can contain nested data in both array-of-rows and map-of-rows contexts. For example: ...