How to make a pivot table correctly?

Question

MySQL

Tell me how to correctly compose a query / pivot table
From table e, we obtain data with the following query.
select plid, oid, sum(e.show) from e group by plid, oid;
+----------+----------+-------------------+
| plid | oid | sum(e.show) |
+----------+----------+-------------------+
| 42 | 0 | 0 |
| 42 | 396 | 522 |
| 42 | 524 | 3 |
| 42 | 526 | 2 |
| 42 | 532 | 24 |
| 42 | 533 | 95 |
| 42 | 551 | 738 |
| 42 | 570 | 763 |
| 42 | 578 | 1 |
| 42 | 579 | 164 |
| 42 | 580 | 7 |
| 42 | 581 | 12 |
| 42 | 583 | 22 |
| 42 | 588 | 1 |
| 45 | 0 | 0 |
| 45 | 396 | 7 |
| 45 | 524 | 6 |
| 45 | 526 | 62 |
| 45 | 527 | 49 |
| 45 | 532 | 10 |
| 45 | 533 | 141 |
| 45 | 536 | 352 |
| 45 | 540 | 285 |
| 45 | 541 | 173 |
| 45 | 544 | 1598 |
| 45 | 551 | 361 |
| 45 | 577 | 284 |
| 45 | 578 | 138 |
| 45 | 579 | 98 |
| 45 | 580 | 170 |
| 45 | 581 | 8 |
| 45 | 583 | 14 |
| 45 | 588 | 216 |
| 47 | 0 | 0 |
| 47 | 396 | 9 |
| 47 | 407 | 328 |
| 47 | 532 | 501 |
| 47 | 555 | 0 |
| 47 | 563 | 868 |
| 47 | 588 | 22 |
+----------+----------+-------------------+
Need to make an oid X plid matrix
Quantity and the values ​​of oid and plid are not known in advance. At the intersection, the sum must be calculated.