Columns
| Column | Type | Size | Nulls | Auto | Default | Children | Parents | Comments | |||
|---|---|---|---|---|---|---|---|---|---|---|---|
| ics_id | INT | 10 | √ | null |
|
|
PK. Auto incrementing. |
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| ics_name | VARCHAR | 50 | null |
|
|
International Commission on Stratigraphy timescale name. |
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| earliest_age | DECIMAL | 12,4 | √ | NULL |
|
|
Earliest age (Ma) |
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| latest_age | DECIMAL | 12,4 | √ | NULL |
|
|
Latest age (Ma) |
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| ics_parent_id | INT | 10 | √ | NULL |
|
|
ID of the parent ics_name. |
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| ics_level | INT | 10 | √ | NULL |
|
|
Level of age bin 1=Eon, 2=Era, 3=Period, 4=Epoch, 5=Age |
Indexes
| Constraint Name | Type | Sort | Column(s) |
|---|---|---|---|
| dic_ics_age_s_pk | Primary key | Asc | ics_id |
| ics_name | Performance | Asc | ics_name |
| PRIMARY | Must be unique | Asc | ics_id |
Relationships
Close relationships within degrees of separation
