Each question comes with a perfectly written answer inline, saving your interview preparation time. It also covers practice problems to help you understand the basic concepts of SQL. We've divided this article
I skipped the introductory section, and jumped straight to intermediate/advanced problems. The book uses an entirely different practice database, and a completely new set of 40 problems. It also assumes that you've completed the original SQL Practice Problems recently, so the concepts are fresh i...
44. With respect to the query and the table structure given below,answer the question.SQL> DESC employees Name Null? Type --- --- --- EMPLOYEE_ID NOT NULL NUMBER(6) FIRST_NAME VARCHAR2(20) LAST_NAME NOT NULL VARCHAR2(25) EMAIL NOT NULL VARCHAR2(25) PHONE_NUMBER VARCHAR2(20) ...
Mastering SQL requires lots of practice. In this article, I took 5 tricky questions and explained the approaches to solve them. The specialty of SQL is that each query can be written in many different ways. Do feel free to share your approaches in the responses. I hope you learned somethin...
Or “List the different types of JOINs!” That’s a stupid type of SQL tech assessment — as it focuses on theory and not on practice. Still, some companies… you know. Take-home SQL assignment. You get a more complex task and you’ll have to write multiple SQL queries to solve it...
EXCEL, ODBC, and OLE DB connection managers require that the SQL command use question marks (?) as parameter markers and 0-based or 1-based numeric values as parameter names. If the Execute SQL task uses the ODBC connection manager, the parameter name that maps to the first parameter in ...
EXCEL, ODBC, and OLE DB connection managers require that the SQL command use question marks (?) as parameter markers and 0-based or 1-based numeric values as parameter names. If the Execute SQL task uses the ODBC connection manager, the parameter name that maps to the first parameter in ...
EXCEL, ODBC, and OLE DB connection managers require that the SQL command use question marks (?) as parameter markers and 0-based or 1-based numeric values as parameter names. If the Execute SQL task uses the ODBC connection manager, the parameter name that maps to the first parameter in ...
SQL Server builds intelligent, dynamic plans that make efficient use of distributed queries to access data from remote member tables:The Query Processor first uses OLE DB to retrieve the check constraint definitions from each member table. This allows the query processor to map the distribution of ...
Focus areas: understanding SQL, basic SQL syntax, and simple queries (SELECT, INSERT, UPDATE, DELETE). Resources: Introductory courses, beginner tutorials, and hands-on practice with small datasets. Outcome: Ability to perform basic data retrieval and manipulation tasks. Intermediate level (1-3 mon...