Explanation:CURRENT is modifiable. 2. Point out the wrong statement :
A. Variables can hold any BSON type data
B. Aggregation expressions can use both user-defined and system variables
C. To access the value of the variable, use a string with the variable name prefixed with double dollar signs ($$)
D. None of the mentioned
Answer:A
Explanation:CURRENT is modifiable. 2. Point out the wrong statement :
A. Variables can hold any BSON type data B. Aggregation expressions can use both user-defined and system variables C. To access the value of the variable, use a string with the variable name prefixed with double dollar signs ($$) D. None of the mentioned
Explanation:If the variable references an object, to access a specific field in the object, use the dot notation; i.e. “$$.“. 3. Which of the operator is similar to order by clause in RDBMS ?