Table: `ndb.externalgeochronology`#

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	6,390
Total Size	1304 kB
Table Size	608 kB
Indexes Size	656 kB

Relationships#

Foreign Keys:

extdatabaseid → externaldatabases.extdatabaseid
geochronid → geochronology.geochronid

Referenced By:

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

Data Dictionary#

Column	Type	Nullable	Default	Constraints
`geochronid`	integer	✓	`-`	FOREIGN KEY, UNIQUE
`extdatabaseid`	integer	✓	`-`	FOREIGN KEY, UNIQUE
`identifier`	text	✓	`-`	UNIQUE

TODO: Review column descriptions and add comments where missing.

Usage Examples#

Example 1: Basic Selection#

-- Get recent records from externalgeochronology
SELECT *
FROM externalgeochronology
ORDER BY geochronid DESC
LIMIT 10;

Purpose: Retrieve the 10 most recent records from externalgeochronology

Example 2: Count Records#

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

Purpose: Get the total number of records in externalgeochronology

Example 3: Join with externaldatabases#

-- Join with related table
SELECT 
    t1.*,
    t2.*
FROM externalgeochronology t1
INNER JOIN externaldatabases t2 
    ON t1.extdatabaseid = t2.extdatabaseid
LIMIT 100;

Purpose: Retrieve externalgeochronology records with related data from externaldatabases

Example 4: Aggregate Data#

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

Purpose: Count records grouped by extdatabaseid

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.externalgeochronology#