| |||
| restricción de columna (A constraint definition that is specified within a column definition when a table is created or altered) | |||
| 英语 词库 | |||
| |||
| column level constraint (ssn) | |||
| |||
| column-level constraint (ssn) | |||
| |||
| restricción de columna (A constraint definition that is specified within a column definition when a table is created or altered) | |||
| 英语 词库 | |||
| |||
| column level constraint (ssn) | |||
| |||
| column-level constraint (ssn) | |||
