what's difference between create socket() by SOCK DGRAM and SOCK STREAM code example

Example: SOCK_STREAM

| Address   |       Socket Type        |
| Family    | SOCK_DGRAM | SOCK_STREAM | 
|-----------|------------|-------------|
| IPX/SPX   | SPX        | IPX         |
| NetBIOS   | NetBIOS    | n/a         |
| IPv4      | UDP        | TCP         |
| AppleTalk | DDP        | ADSP        |
| IPv6      | UDP        | TCP         |
| IrDA      | IrLMP      | IrTTP       |
| Bluetooth | ?          | RFCOMM      |