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Help
If you have any questions, you are always welcome to contact us. We'll get back to you as soon as possible, withing 24 hours on weekdays.
Customer service
All questions about your order, return and delivery must be sent to our customer service team by e-mail at yourstore@yourdomain.com
Sale & Press
If you are interested in selling our products, need more information about our brand or wish to make a collaboration, please contact us at press@yourdomain.com
Datubaseen irakasgai baten irakasle izanik (UPV/EHU), praktikatu eta ikasteko aukera emango zuten SQL ariketa konplexuen gabezia detektatu izan dugu bibliografian. Horregatik, hainbat ariketen bilketan arreta berezia jarri dugu. Ikasketamaterial ona izan dela uste dugu, eta horregatik liburu honetan argitaratzen dugu. Liburua SQL ariketa konplexuagoenetan zentratzen da zuzenean. Domeinuetan nahiz kontsultak burutzeko erabilitako SQL egitura eta/edo eragiketetan aldaerak sartzen saiatu gara; eta zenbait kasutan enuntziatu batzuen artean desberdintasun finak eta era berean garrantzitsuak sartu ditugu. Horrela, ikasleak, edo edozein teknikari informatikok, nahi adina praktikatzeko aukera izango du eta zailtasunmaila desberdinei aurre egin ahal izango die. Gainera, batzuetan, ebazpide okerrak ere sartu dira, azalpenak emanez, aurretik egindako akatsetatik ere ikasten dela uste baitugu, asko ikasi ere. SQL kontsultak ebazten, arkatza eta paper zuriari aurre eginez eta enuntziatuan planteaturiko logikaren gainean hausnartuz ikasten dela uste dugu. Konputagailuaren aurrean Proba eta errorea teknika erabiltzea egokia denik ez dugu uste. Beraz, animo eta kontsultak ebazteari ekin!
⚠️ WARNING (California Proposition 65):
This product may contain chemicals known to the State of California to cause cancer,
birth defects, or other reproductive harm.
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⚠️ California Proposition 65 Warning: Some products sold on this website may expose you to chemicals known to the State of California to cause cancer, birth defects, or other reproductive harm. For more information, visit www.P65Warnings.ca.gov.
