删除\\ n及之后在mysql列中的所有内容

Question

I have a mysql table like the example below. Sometimes there is an extra line a \\n the column with info afterward that I do not need and I would like to remove it keeping only the first line. How would I remove these \\n's and the data afterward in the column?

| column1          |
+------------------+
| name1            |
| useless info     |
+------------------+
| name2            |
+------------------+
| name3            |
+------------------+

My goal would be to end up with this:

| column1          |
+------------------+
| name1            |
+------------------+
| name2            |
+------------------+
| name3            |
+------------------+

Answer 1

Use SUBSTRING_INDEX()

update your_table
set column1 = SUBSTRING_INDEX(column1 , '\n', 1) 

Answer 2

update 
t
set t.col1 = 
case 
 when locate("\n",col1) > 0 
  then left(col1,locate("\n",col1))
 else col1 end
from test t