Constraint violated when key value in tuple already exists in some other relation's tuple is called
They gazed across valley (Which word is a common noun?)
A board of directors refused new proposal. (Which word is a collective noun?)
Please keep boxes carefully. (Which word is a common noun?)
What is reason of his failure in exams (Which word is an abstract noun?)
Butterflies taste with their legs (Which word is a plural noun?)
Which is demonstrative pronoun in sentence "That is my town, itself is not very large as cities are."
Where are my books? I kept it on my study table. (Which word is a countable noun?)
Sometime, I do not understand John (Which word is a proper noun?)
My sister eats chocolate (Which word is a nominative noun?)
First aid was given to wounded man. (Which word is a collective noun
Which is possessive pronoun in sentence "I respect her concern, but my profession is my first priority."