SQL
Star Expression
The `*` expression can be used in a `SELECT` statement to select all columns that are projected in the `FROM` clause.  
```sql
SELECT *
FROM tbl;
```  
The `*` expression can be modified using the `EXCLUDE` and `REPLACE`.  
#### `EXCLUDE` Clause {#docs:sql:expressions:star::exclude-clause}  
`EXCLUDE` allows us to exclude specific columns from the `*` expression.  
```sql
SELECT * EXCLUDE (col)
FROM tbl;
```  
#### `REPLACE` Clause {#docs:sql:expressions:star::replace-clause}  
`REPLACE` allows us to replace specific values in columns as specified by an expression.  
```sql
SELECT * REPLACE (col / 1_000 AS col)
FROM tbl;
```