Oracle 1Z0-071 Exam - Topic 6 Question 125 Discussion

Actual exam question for Oracle's 1Z0-071 exam

Question #: 125
Topic #: 6

[All 1Z0-071 Questions]

Examine the description of the CUSTOMERS table:

Which three statements will do an implicit conversion?

ASELECT * FROM customers WHERE insert_date=DATE'2019-01-01';

BSELECT * FROM customers WHERE customer_id='0001';

CSELECT * FROM customers WHERE TO_DATE(insert_date)=DATE'2019-01-01';

DSELECT * FROM customers WHERE insert_date'01-JAN-19';

ESELECT * FROM customers WHERE customer_id=0001;

FSELECT * FROM customers WHERE TO_CHAR(customer_id)='0001';

Show Suggested Answer

Suggested Answer: B, D, F

A: No implicit conversion; DATE is explicitly specified.

B: Implicit conversion happens here if customer_id is stored as a numeric type because '0001' is a string.

C: TO_DATE is explicitly used, so no implicit conversion occurs here.

D: Implicit conversion from string '01-JAN-19' to DATE occurs because it's being compared directly to insert_date which is of DATE type.

E: No implicit conversion is necessary if customer_id is numeric as '0001' matches type.

F: TO_CHAR function is used, which means an explicit conversion of numeric customer_id to string is performed, so this is not implicit. Hence, this is incorrect regarding implicit conversion.

Each answer has been verified with reference to the official Oracle Database 12c SQL documentation, ensuring accuracy and alignment with Oracle's specified functionalities.

by Shawana at Jan 05, 2026, 05:16 AM

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Corazon

13 days ago

C is the only one that does an explicit conversion. The rest are just playing tricks with the data.

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Salome

18 days ago

Wow, implicit conversion? That's like magic, but with numbers!

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Bobbye

23 days ago

B, E, and F will do an implicit conversion.

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Ardella

29 days ago

I believe option F is definitely doing an implicit conversion since it's converting the customer_id to a string for comparison.

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Myrtie

1 month ago

I'm a bit confused about option B; isn't comparing a string to an integer also a type conversion?

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Tori

1 month ago

I remember practicing a question similar to this, and I think option D could also involve an implicit conversion with the date format.

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Ocie

1 month ago

I think option A might do an implicit conversion because of the date format, but I'm not entirely sure.

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Nettie

2 months ago

Alright, time to put on my thinking cap. I'll go through each option and evaluate whether an implicit conversion is happening.

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Della

2 months ago

I've seen questions like this before. I think the key is to identify which comparisons are happening between different data types.

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Miles

2 months ago

I'm a bit confused on the difference between implicit and explicit conversion. I'll need to review that concept before answering this.

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Jacquline

2 months ago

Okay, let me think this through step-by-step. I'll need to consider the data types of the columns and how the conditions are being compared.

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Mary

2 months ago

Hmm, this looks tricky. I'll need to carefully analyze the data types and conversion functions to figure out which ones will do an implicit conversion.

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