What is the maximum size of a row in Oracle?
4,000GB
1 Answer. Maximum row size: For Oracle8, Release 8.0 and later, the answer is 4,000GB (or 4GB per LOB, 1,000 LOBs per table). Just take the maximum varchar2 size (4000) or char size (2000) and add them up—4000×1000=4,000,000 bytes of structured data.
How many grouping is possible in the roll up?
ROLLUP will create subtotals at n+1 levels, where n is the number of grouping columns. For instance, if a query specifies ROLLUP on grouping columns of Time, Region, and Department ( n=3), the result set will include rows at four aggregation levels.
Can we use MAX function in where clause in Oracle?
2 Answers. You can use this method, but you need a correlated subquery: SELECT co. order_no, co.
What is the maximum number of records each DBMS can hold?
The MyISAM storage engine supports 232 rows per table, but you can build MySQL with the –with-big-tables option to make it support up to 264 rows per table. The InnoDB storage engine has an internal 6-byte row ID per table, so there are a maximum number of rows equal to 248 or 281,474,976,710,656.
Can be carried out by an extension of grouping in SQL?
ROLLUP, CUBE, and GROUPING SETS are GROUP BY extensions available in SQL Server, a relational database developed by Microsoft. SQL Server is among the three most widely used databases in the world.
How does grouping sets work?
GROUP BY GROUPING SETS is equivalent to the UNION of two or more GROUP BY operations in the same result set: GROUP BY GROUPING SETS((a)) is equivalent to the single grouping set operation GROUP BY a . GROUP BY GROUPING SETS((a),(b)) is equivalent to GROUP BY a UNION ALL GROUP BY b .
Can we use Max in WHERE clause?
MAX() function with Having The SQL HAVING CLAUSE is reserved for aggregate function. The usage of WHERE clause along with SQL MAX() have also described in this page. The SQL IN OPERATOR which checks a value within a set of values and retrieve the rows from the table can also be used with MAX function.