Search results for "QL"
showing 4 items of 424 documents
Error messages in relational database management systems: A comparison of effectiveness, usefulness, and user confidence
2021
Abstract The database and the database management system (DBMS) are two of the main components of any information system. Structured Query Language (SQL) is the most popular query language for retrieving data from the database, as well as for many other data management tasks. During system development and maintenance, software developers use a considerable amount of time to interpret compiler error messages. The quality of these error messages has been demonstrated to affect software development effectiveness, and correctly formulating queries and fixing them when needed is an important task for many software developers. In this study, we set out to investigate how participants ( N = 152 ) …
Lietotāja servisi vizuālā vaicājumu rīkā
2018
Palielinoties saistītās informācijas apjomam, ir nepieciešams atrisināt informācijas meklēšanas jautājumu. SPARQL vaicājumvaloda, kas ir oficiāla vaicājumvaloda RDF datiem, ir pietiekami komplicēta, lai to varētu izmantot visi lietotāji, ieskaitot ne-IT speciālistus. Vizuālie vaicājumu uzdošanas rīki ļauj lietotājam veidot vaicājumu vizuālajā formā un atrisina šo problēmu, bet pieejamo rīku skaits nav liels, un to izteiksmes spēja būtiski atpaliek no pilnās tekstuālās vaicājumu valodas iespējām. ViziQuer rīks ir vizuālais vaicājumu uzdošanas rīks, kas ir izstrādāts LU MII, un pilnveidošana turpinās, lai palielināt tā iespējas. Šajā darbā ir apskatīti daži no pieejamiem rīkiem un salīdzināti…
Importance of millipedes (Diplopoda) in the autumn-winter diet of Scolopax rusticola
2019
Authors examined the autumn-winter diet of the woodcock Scolopax rusticola from 407 gizzard samples originating from Crimea and Italy, resulting in a high number of millipedes (Diplopoda) in all the samples; this prey item was particularly important in terms of weight percentage. The authors consider that calcium, highly present in millipedes, should be an important source for the woodcocks’ metabolism during the autumn-winter seasons.
The Use of Stable Isotope Ratio Analysis to Trace European Sea Bass (D. labrax) Originating from Different Farming Systems
2020
This study aimed to determine whether isotopic ratio mass spectrometry (IRMS) can discriminate farmed European sea bass according to different farming systems and geographic origins. Dicentrarchus labrax of commercial size from three different rearing systems (concrete tank inland, sea cages, and extensive methods in valleys or salt works) were collected at the trading period (autumn&ndash