What is a bind query?
The DSN subcommand BIND QUERY reads the statement text, default schema, and a set of bind options from every row of DSN_USERQUERY_TABLE, and information from correlated EXPLAIN table rows. When LOOKUP(NO) is in effect, DB2® inserts the pertinent data into certain catalog tables.
What are parameterized query?
A parameterized query is a query in which placeholders are used for parameters and the parameter values are supplied at execution time. The most important reason to use parameterized queries is to avoid SQL injection attacks.
How to execute a query with bind variables?
According to the datatype of the bind variable, you need to select the respective setter method. Here, in this case, the data type of the bind variable is integer therefore, we need to use setInt () method. To this method, you need to pass an integer representing the placement index of the place holder and value you want to set to it.
How are bind variables used in Oracle Database?
Bind variables can be IN or OUT. The IN bind variables allow you to pass data from Python to Oracle Database while the OUT bind variables allow you to get data back from the Oracle Database to Python. In the previous examples, you have passed in bind variables to the Oracle Database to query data and used a Cursor to fetch the result.
When do I need to pass the value of the bind variable?
In this query, the :customer_id is a placeholder. It is also known as a bind variable or bind parameter. When you execute a query using the Cursor object, you need to pass the value of the bind variable:
How to create a bind variable in Python?
In the previous examples, you have passed in bind variables to the Oracle Database to query data and used a Cursor to fetch the result. To have the Oracle Database return data to the Python, you need to create a variable by using the Cursor.var () method.