USE
Connects the client session to a keyspace.
Identifies the keyspace for the current client session. All subsequent operations on tables and indexes are in the context of the named keyspace, unless otherwise specified or until the client connection is terminated or another USE statement is issued.
To use a case-sensitive keyspace, enclose the keyspace name in single quotes.
Synopsis
USE keyspace_name| Syntax conventions | Description | 
|---|---|
| UPPERCASE | Literal keyword. | 
| Lowercase | Not literal. | 
| Italics | Variable value. Replace with a user-defined value. | 
| [] | Optional. Square brackets (  [] ) surround optional command
                arguments. Do not type the square brackets. | 
| ( ) | Group. Parentheses ( ( )) identify a group to choose from. Do
                not type the parentheses. | 
|  |  | Or. A vertical bar (  | ) separates alternative elements. Type
                any one of the elements. Do not type the vertical bar. | 
| ... | Repeatable. An ellipsis ( ...) indicates that you can repeat
                the syntax element as often as required. | 
| 'Literal string' | Single quotation (  ' ) marks must surround literal strings in
                CQL statements. Use single quotation marks to preserve upper case. | 
| { key : value } | Map collection. Braces (  { } ) enclose map collections or key
                value pairs. A colon separates the key and the value. | 
| <datatype1,datatype2> | Set, list, map, or tuple. Angle brackets ( < >) enclose
                data types in a set, list, map, or tuple. Separate the data types with a comma. | 
| cql_statement; | End CQL statement. A semicolon (  ; ) terminates all CQL
                statements. | 
| [--] | Separate the command line options from the command arguments with two hyphens ( --). This syntax is useful when arguments might be mistaken for
                command line options. | 
| ' <schema> ... </schema> ' | Search CQL only: Single quotation marks (  ' ) surround an
                entire XML schema declaration. | 
| @xml_entity='xml_entity_type' | Search CQL only: Identify the entity and literal value to overwrite the XML element in the schema and solrConfig files. | 
Example
USE PortfolioDemo;USE "Excalibur";