To add-on responses by @dlehman1 & @txnelson with images,
Easiest way is to use the GUI / user interface (see steps below).
1) Click "Row" > "Row Selection" > "Select Where"
![WebDesignesCrow_0-1713431960245.png WebDesignesCrow_0-1713431960245.png](https://community.jmp.com/t5/image/serverpage/image-id/63456iFA7589BF8B8110C7/image-size/medium?v=v2&px=400)
2) Select the column > Is Missing > Add condition
![WebDesignesCrow_1-1713432095859.png WebDesignesCrow_1-1713432095859.png](https://community.jmp.com/t5/image/serverpage/image-id/63457i5CF268B202CC63B3/image-size/medium?v=v2&px=400)
3) Repeat step 2 for all columns
![WebDesignesCrow_2-1713432131389.png WebDesignesCrow_2-1713432131389.png](https://community.jmp.com/t5/image/serverpage/image-id/63458i078423002E9A929F/image-size/medium?v=v2&px=400)
4) Select rows > choose if "any condition is met"
![WebDesignesCrow_3-1713432274032.png WebDesignesCrow_3-1713432274032.png](https://community.jmp.com/t5/image/serverpage/image-id/63459iD1BDEBDD83C5FC28/image-size/medium?v=v2&px=400)
5) Click "Apply"
![WebDesignesCrow_4-1713432312253.png WebDesignesCrow_4-1713432312253.png](https://community.jmp.com/t5/image/serverpage/image-id/63460i23094BE8E0BB3461/image-size/medium?v=v2&px=400)
6) right click at table rows > choose "delete rows"
![WebDesignesCrow_6-1713432380152.png WebDesignesCrow_6-1713432380152.png](https://community.jmp.com/t5/image/serverpage/image-id/63462iDF658817048B6C31/image-size/medium?v=v2&px=400)
6) Result as below;
![WebDesignesCrow_7-1713432425778.png WebDesignesCrow_7-1713432425778.png](https://community.jmp.com/t5/image/serverpage/image-id/63463i2FC4BFDD78B76695/image-size/medium?v=v2&px=400)