diff --git a/Copy-data-to-postgresql.md b/Copy-data-to-postgresql.md
index dd27512..14f5eae 100644
--- a/Copy-data-to-postgresql.md
+++ b/Copy-data-to-postgresql.md
@@ -37,4 +37,10 @@ tail -n +2 /data/raw/data.csv | iconv -c -f ASCII -t UTF-8 | psql -U postgres -h
 To change the semicolon separator with comma:
 ```
 sed --expression='s/;/,/g'
+```
+
+You may also need to alter some columns
+
+```
+psql -U postgres -h localhost -c 'ALTER TABLE "opportunities" ALTER COLUMN "ProductName" type varchar(1024);' 
 ```
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