How to pass a parameter into a long query in teradata

@cali_green 

In Teradata, you can pass a parameter into a long query using a parameter marker. Parameter markers are placeholders in the query that can be replaced with actual values when the query is executed.

Here is an example of how to pass a parameter into a long query in Teradata:

1. Define a parameter marker in the query using a question mark ('?'). For example:

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SELECT * FROM table_name WHERE column_name = ?;

1. Prepare the query with the parameter marker in your application code and bind the actual value to the parameter marker. For example, in Python:

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import teradatasql

# Connect to Teradata database
con = teradatasql.connect('{"host":"your_host","user":"your_user","password":"your_password"}')

# Prepare the query with parameter marker
query = "SELECT * FROM table_name WHERE column_name = ?"

# Bind the actual value to the parameter marker
param = 'value_to_pass'
with con.cursor() as cur:
    cur.execute(query, (param,))
    result = cur.fetchall()

# Close the connection
con.close()

1. Execute the query with the actual parameter value and retrieve the results.

By using parameter markers, you can pass parameters into long queries in Teradata efficiently and securely. This helps in preventing SQL injection attacks and makes the query reusable with different parameter values.