Table: `ndb.specimendatescal`#

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	2,609
Total Size	320 kB
Table Size	240 kB
Indexes Size	80 kB

Relationships#

Primary Key: specimendatecalid

Foreign Keys:

calibrationcurveid → calibrationcurves.calibrationcurveid
calibrationprogramid → calibrationprograms.calibrationprogramid
specimendateid → specimendates.specimendateid

Referenced By:

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

Data Dictionary#

Column	Type	Nullable	Default	Constraints
`specimendatecalid`	integer	✗	`nextval('ndb.seq_specimenda...`	PRIMARY KEY
`specimendateid`	integer	✗	`-`	FOREIGN KEY
`calage`	double precision	✓	`-`	-
`calageolder`	double precision	✓	`-`	-
`calageyounger`	double precision	✓	`-`	-
`calibrationcurveid`	integer	✓	`-`	FOREIGN KEY
`calibrationprogramid`	integer	✓	`-`	FOREIGN KEY
`datecalibrated`	date	✓	`-`	-
`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 specimendatescal
SELECT *
FROM specimendatescal
ORDER BY specimendatecalid DESC
LIMIT 10;

Purpose: Retrieve the 10 most recent records from specimendatescal

Example 2: Count Records#

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

Purpose: Get the total number of records in specimendatescal

Example 3: Filter by Date Range#

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

Purpose: Retrieve records from specimendatescal within a specific date range

Example 4: Join with calibrationcurves#

-- Join with related table
SELECT 
    t1.*,
    t2.*
FROM specimendatescal t1
INNER JOIN calibrationcurves t2 
    ON t1.calibrationcurveid = t2.calibrationcurveid
LIMIT 100;

Purpose: Retrieve specimendatescal records with related data from calibrationcurves

Example 5: Aggregate Data#

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

Purpose: Count records grouped by specimendateid

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.specimendatescal#