what is a select operationthe select operation
What is a SELECT operation?
The select operation selects tuples that please a given predicate. We use the lowercase letter σ to denote selection.
Expected delivery within 24 Hours
what is a primary keyprimary key is chosen by the database designer as the principal means of identifying an entity in the entity
explain feed - cutting parameters1 in cylindrical grinding feed is the longitude movement of the work piece per revolutionffeed in mm per work piece
what is a super keya super key is a set of one or more attributes that collectively permits us to recognize uniquely an entity in the entity
define- relational algebrathe relational algebra is a procedural query language it having of a set of operations that take one or two relation as
what is a select operationthe select operation selects tuples that please a given predicate we use the lowercase letter sigma to denote
what is a project operationthe project operation is a unary operation that returns its argument relation with particular attributes left out
q is there respiratory pigment in the annelid bloodthe blood in beings of the phylum annelida contains the respiratory pigment hemoglobin the same
write short notes on tuple relational calculusthe tuple relational calculation is anon procedural query language it defines the desired information
write short notes on domain relational calculusthe domain relational calculus uses domain variables that take on values from an attribute domain
1929142
Questions Asked
3,689
Active Tutors
1420591
Questions Answered
Start Excelling in your courses, Ask a tutor for help and get answers for your problems !!
Question: Which medication for postoperative nausea and vomiting (PONV) is contraindicated for use in the pediatric population?
Question: Which adverse reaction would the nurse monitor for in a child prescribed prednisone for exacerbation of asthma?
Which action would the nurse perform if a parent of hispanc origin informs the nurse of plans to wean their 10-month-old child by giving anise tea
The revenue cycle involves many steps, and each step has a critical role in how health care reimbursement is delivered.
According to Healthy People health indicators, which area would the nurse include to improve the overall health of elementary school children?
How would you instruct the patient to taper off clonazepam? What other medication would you recommend for the patient for the treatment
Which action would the nurse take in providing care for an 8-month-old infant restrained to prevent interference with an intravenous infusion?