Which one of the following sorts rows in SQL?

Correct Answer: IS NULL operator

Explanation:

SELECT "column_name"

FROM "table_name"

WHERE "column_name" IS NULL.

Correct Answer: One of the most common errors that you might face in join statements is Server: Msg 4104, Level 16, State 1, Line 1 The multi-part identifier could not be bound A multipart identifier is any description of a field or table that contains multiple parts - for instance MyTableSomeRow - if it can't be bound that means there's something wrong with it - either you've got a simple typo, or a confusion between table and column It can also be caused by using reserved words in your table or field names and not surrounding them with [] The main reason for this error is that the source table cannot be found, for example if you have statement such as Table1OrderDate, and then if you get error above, this means that Table1 cannot be found in the query Sometimes you can see that source table exists in the query, but T-SQL cannot understand it, especially when you write join statements

Correct Answer: In SQL, UNION merges the contents of two structurally-compatible tables into a single combined table

Correct Answer: Master database is system database and it contains information about running server's configuration When SQL Server 2005 is installed it usually creates master, model, msdb, tempdb resource and distribution system database by default Only Master database is th one which is absolutely must have database Without Master database SQL Server cannot be started This is the reason it is extremely important to backup Master database To rebuild the Master database, Run Setupexe, verify, and repair a SQL Server instance, and rebuild the system databases This procedure is most often used to rebuild the master database for a corrupted installation of SQL Server

Correct Answer: Aggregate functions perform a calculation on a set of values and return a single value Aggregate functions ignore NULL values except COUNT function HAVING clause is used, along with GROUP BY, for filtering query using aggregate values Following functions are aggregate functions AVG, MIN CHECKSUM_AGG, SUM, COUNT, STDEV, COUNT_BIG, STDEVP, GROUPING, VAR, MAX VARP

Correct Answer: Involves the use of an inner and outer query.

Correct Answer: All of the above

Correct Answer: =

Explanation:

The comparison operator that is used in SQL is '='. Comparison operators test whether two expressions are the same. Comparison operators can be used on all expressions except expressions of the text, ntext, or image data types.

Correct Answer: Boolean operators

Correct Answer: Oracle SQL developer is an Oracle Database IDE