Boolean
Booleans are a data type used to represent True or False. The following table summarizes values that are represented as Boolean when used in a query with a data column type of Boolean:
| Boolean Value | Accepted Values |
| True | t, true, y, yes, on, 1 |
| False | f, false, n, no, off, 0 |
Table 2.3: Accepted Boolean valuesNote that the values are not case sensitive. While all these values are accepted, the values of True and False are compliant with best practice. Booleans can also take on NULL values.