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What are primary keys and foreign keys?
Primary keys are the unique identifiers for every row. They must have unique values and cannot be null. Due to their significance in relational databases, Primary keys are the most fundamental of all keys and constraints. A table can have only one Primary key. Foreign keys are both a method of ensuring data integrity and a manifestation of the relationship among tables.
Microsoft access has vast advantages for a programmer and end user. Some of the advantages are ? Relative compatibility with SQL and VBA. ? Microsoft SQL server desktop engi
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In order to suppress the leading zeroes of a number field the which keywords is used ? NO-ZERO.
Q. State the difference between following. i. RAM and ROM ii. SRAM and DRAM iii. Dynamic and static MOS memories
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How can it be achieved in designing e-cash based system? E-cash is essentially an online solution. The buyer must validate the coins by the issuer in order to get the purchase
CSEG SEGMENT ASSUME CS:CSEG, DS:CSEG, SS:CSEG ORG 100h START:MOV AX, CSEG; Initialise data segment MOV DS, AX; register using AX MOV AL, NUM1; Take the first num
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