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Number of tables required in above ER diagram will be _____________ Is $R_{1}$ create separate table or not?? and $R_{2}$ look like if we remove loop from it?? Answer given for table $E_{1}R_{1}$ Key will be $AC$ , with $C$ foreign key. And for ... $2$ Entities. So, it will add one extra table. I already read https://gateoverflow.in/229580/madeeasy-test-series-number-of-tables-required
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Consider the relation $R\left ( A,B,C,D,E \right )$ with functional dependencies $F=${ $A\rightarrow B$ $BC\rightarrow E$ $ED\rightarrow A$ } Number of additional relation required to convert it into lossless , dependency preserving $3NF$ decomposition is _____________ What is meaning of additional relation (Here no table mentioned previously)??
The minimum number of nodes (both leaf and non-leaf) of $B^{+}$ tree index required for storing $5500$ keys and order of $B^{+}$ tree is $8$________________(order is max pointers a node can have) See here first level should be divide by $7$ $2nd$ levelshould divide by ... each $7$ pointer of 1st level has $8$ pointer in 2nd level. Am I missing something?? But in ans they divided by only $8$ :(
Find the name of Sailors with a higher rating than all sailors with age $<22?$ $Query1:$ Select S.name from sailor S where not exists (Select * from sailor $S_{2}$where $S_{2}.age<22$ and $S.rating<=S_{2}.rating$) $Query2:$ Select S.name ... is correct sql for above query?? I think Query2 and Query3 itself differentiate with ANY and ALL keyword. But what about Query1? Will it return ALL tuples?