Cassandra - update data. updating data using cqlsh. update is the command used to update data in a table. the following keywords are used while updating data in a table: where - this clause is used to select the row to be updated. set - set the value using this keyword. must - includes all the columns composing the primary key. while. Upsert means that cassandra will insert a row if a primary key does not exist already otherwise if primary key already exists, it will update that row. update data command 'update' is used to update the data in the cassandra table.. The primary key designation is the simplest form. a single parameter that identifies a single video uploaded to our system. the first element in our primary key is what we call a partition key. the partition key has a special use in apache cassandra beyond showing the uniqueness of the record in the database..
Update with cassandra cql. ask question. up vote 1 down vote favorite. i'm new to cassandra and i'm trying to update a table using this cql query: you have to pass all primary key when you want to update column . so put all primary keys in where clause . share | improve this answer. answered aug 17 '15 at 5:29. mahendra singh. 28 2.. In cassandra , the difference between primary key,partition key,composite key, clustering key always makes some confusion.. so i am going to explain below and co relate to each others. we use cql (cassandra query language) for cassandra database access.. Primary key columns in cassandra, two types of columns have a special role: the partition key columns and the clustering columns. together, they will define your row primary key. the partition key columns are the first part of primary key and their role is to spread data evenly around the cluster..