SCHOOLGRADELEVEL
                                        Stores the grade levels associated with a given school.  
                                        Primary Key
                                        
                                            
                                                
                                                    | Primary Key | Field Type | 
                                            
                                            
                                                
                                                    | ID | uniqueidentifier | 
                                            
                                        
                                        Fields
                                        
                                            
                                                
                                                    | Field | Field Type | Null | Notes | Description | 
                                            
                                            
                                                
                                                    | DATEADDED | datetime |  | Default = getdate() | Indicates the date this record was added. | 
                                                
                                                    | DATECHANGED | datetime |  | Default = getdate() | Indicates the date this record was last changed. | 
                                                
                                                    | TS | timestamp |  |  | Timestamp. | 
                                                
                                                    | TSLONG | bigint (Computed) | yes | CONVERT(bigint, TS) | Numeric representation of the timestamp. | 
                                            
                                        
                                        Foreign Keys
                                        
                                            
                                                
                                                    | Foreign Key | Field Type | Null | Notes | Description | 
                                            
                                            
                                                
                                                    | SCHOOLID | uniqueidentifier |  | SCHOOL.ID | The school for which this grade level is allowed. | 
                                                
                                                    | GRADELEVELID | uniqueidentifier |  | GRADELEVEL.ID | The grade level which to associate with the school. | 
                                                
                                                    | ADDEDBYID | uniqueidentifier |  | CHANGEAGENT.ID | FK to CHANGEAGENT. | 
                                                
                                                    | CHANGEDBYID | uniqueidentifier |  | CHANGEAGENT.ID | FK to CHANGEAGENT. | 
                                            
                                        
                                        Indexes
                                        
                                            
                                                
                                                    | Index Name | Fields | Unique | Primary | Clustered | 
                                            
                                            
                                                
                                                    | IX_SCHOOLGRADELEVEL_DATEADDED | DATEADDED |  |  | yes | 
                                                
                                                    | IX_SCHOOLGRADELEVEL_DATECHANGED | DATECHANGED |  |  |  | 
                                                
                                                    | PK_SCHOOLGRADELEVEL | ID | yes | yes |  | 
                                                
                                                    | UIX_SCHOOLGRADELEVEL_SCHOOLID_GRADELEVELID | SCHOOLID, GRADELEVELID | yes |  |  | 
                                            
                                        
                                        Triggers
                                        
                                        Referenced by