Columns
| Column | Type | Size | Nulls | Auto | Default | Children | Parents | Comments | ||
|---|---|---|---|---|---|---|---|---|---|---|
| sampleageid | serial | 10 | √ | nextval('ndb.seq_sampleages_sampleageid'::regclass) |
|
|
An arbitrary Sample Age identification number. |
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| sampleid | int4 | 10 | null |
|
|
Sample identification number. Field links to the Samples table. |
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| chronologyid | int4 | 10 | null |
|
|
Chronology identification number. Field links to the Chronologies table. |
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| age | float8 | 17,17 | √ | null |
|
|
Age of the sample |
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| ageyounger | float8 | 17,17 | √ | null |
|
|
Younger error estimate of the age. The definition of this estimate is an attribute of the Chronology. Many ages do not have explicit error estimates assigned. |
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| ageolder | float8 | 17,17 | √ | null |
|
|
Older error estimate of the age. |
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| recdatecreated | timestamp | 22 | timezone('UTC'::text, now()) |
|
|
|||||
| recdatemodified | timestamp | 22 | null |
|
|
Indexes
| Constraint Name | Type | Sort | Column(s) |
|---|---|---|---|
| sampleages_pkey | Primary key | Asc | sampleageid |
| ix_chronologyid_sampleages | Performance | Asc | chronologyid |
| ix_sampleid_sampleages | Performance | Asc | sampleid |
| smpage_idx | Performance | Asc | age |
| smpageold_idx | Performance | Asc | ageolder |
| smpageyoung_idx | Performance | Asc | ageyounger |