See below for a query on how to get all columns with a given name for a specific schema in Oracle:
SELECT t.owner AS schema_name, t.table_name, c.column_name FROM sys.all_tables t INNER JOIN sys.all_tab_columns c ON t.table_name = c.table_name WHERE LOWER(t.owner) = LOWER('MySchemaNameHere') AND LOWER(c.column_name) LIKE LOWER('%MyColumnNameHere%') ORDER BY t.owner, t.table_name, c.column_name;
source share