Table: `ndb.isostandards`#

Description#

No description available in database.

TODO: Expand this description with: - What data does this table store? - What is the business/research purpose? - How is this data collected or generated? - Are there any important caveats or data quality issues?

Table Structure#

Schema: ndb | Table Comment: No description available

Statistics#

Metric	Value
Row Count	0
Total Size	8192 bytes
Table Size	0 bytes
Indexes Size	8192 bytes

Relationships#

Primary Key: datasetid, variableid, isostandardid

Foreign Keys:

datasetid → datasets.datasetid
isostandardid → isostandardtypes.isostandardtypeid
variableid → variables.variableid

Referenced By:

TODO: Document which tables reference this table (will be auto-detected in validation).

Data Dictionary#

Column	Type	Nullable	Default	Constraints
`datasetid`	integer	✗	`-`	FOREIGN KEY, PRIMARY KEY
`variableid`	integer	✗	`-`	FOREIGN KEY, PRIMARY KEY
`isostandardid`	integer	✗	`-`	PRIMARY KEY
`value`	double precision	✗	`-`	-
`recdatecreated`	timestamp without time zone	✗	`timezone('UTC'::text, now())`	-
`recdatemodified`	timestamp without time zone	✗	`-`	-

TODO: Review column descriptions and add comments where missing.

Usage Examples#

Example 1: Basic Selection#

-- Get recent records from isostandards
SELECT *
FROM isostandards
ORDER BY datasetid DESC
LIMIT 10;

Purpose: Retrieve the 10 most recent records from isostandards

Example 2: Count Records#

-- Count total records
SELECT COUNT(*) as total_records
FROM isostandards;

Purpose: Get the total number of records in isostandards

Example 3: Filter by Date Range#

-- Get records within a date range
SELECT *
FROM isostandards
WHERE recdatecreated >= '2024-01-01'
  AND recdatecreated < '2025-01-01'
ORDER BY recdatecreated DESC;

Purpose: Retrieve records from isostandards within a specific date range

Example 4: Join with datasets#

-- Join with related table
SELECT 
    t1.*,
    t2.*
FROM isostandards t1
INNER JOIN datasets t2 
    ON t1.datasetid = t2.datasetid
LIMIT 100;

Purpose: Retrieve isostandards records with related data from datasets

Example 5: Aggregate Data#

-- Aggregate records by variableid
SELECT 
    variableid,
    COUNT(*) as count
FROM isostandards
GROUP BY variableid
ORDER BY count DESC
LIMIT 10;

Purpose: Count records grouped by variableid

TODO: Add more specific examples relevant to common research questions or operational tasks.

Data Quality Notes#

TODO: Document: - Known data quality issues - Validation rules - Expected data ranges - Update frequency and mechanisms - Any ETL processes that populate this table

Maintenance#

Data Owner: TODO: Assign owner
Update Frequency: TODO: Document frequency
Last Major Schema Change: TODO: Document when schema last changed

Table: ndb.isostandards#