| Table Ref | check level | SQL Ref | Description |
| ch | 1 | CHAR | Character String. A string with a maximum length of 255 characters. |
| vc | 1 | VARCHAR | Variable Character String. A string with a maximum length of 255 characters. |
| tt | 1 | TINYTEXT | Tiny Text. A string with a maximum length of 255 characters. |
| tx | 1 | TEXT | Text. A string with a maximum length of 65535 characters. |
| ti | 2 | TINYINT | -128 to 127 |
| pi | 2 | POSINT | Positive Integer. 0 to 99999 |
| in | 2 | INT | Integer. -2147483648 to 2147483647 |
| fl | 2 | FLOAT | A small number with a floating decimal point. |
| do | 2 | DOUBLE | A large number with a floating decimal point. |
| pd | 2 | POSDOUBLE | A large positive number with a floating decimal point. |
| da | 3 | DATE | YYYY-MM-DD. |
| tm | 3 | TIME | HH:MM:SS. |