Puas sql yuav tsum yog tus lej loj?

Cov txheej txheem:

Puas sql yuav tsum yog tus lej loj?
Puas sql yuav tsum yog tus lej loj?
Anonim

teb. Tsis yog, SQLite, uas Codecademy Codecademy Codecademy yog ib qho American online sib tham sib platform uas muaj cov chav kawm coding dawb hauv 12 hom lus sib txawv suav nrog Python (pandas-Python tsev qiv ntawv, Zoo Nkauj Soup-Python Library), Java, Mus, JavaScript (jQuery, AngularJS, React. https://en.wikipedia.org › wiki › Codecademy

Codecademy - Wikipedia

siv, yog case-insensitive thaum nws losrau clauses xws li SELECT thiab FROM uas tuaj yeem raug foob hauv txhua txoj kev. Qhov no txawv ntawm lwm yam lus programming xws li Python qhov casing tseem ceeb heev.

Yuav tsum SQL capitalized?

SQL yog ib hom lus hais lus, ntau dua li lwm yam uas kuv tau ntsib. Koj tau txais koj cov SELECT clause, thiab koj FROM clause, thiab koj JOIN clause(s) thiab koj cov nqe lus nyob qhov twg. ORDER BY, GROUP LOS, thiab lwm yam.

Kuv puas tuaj yeem sau SQL ua tus lej qis?

Cov lus SQL txhais tau tias yog case-insensitive. Tshem koj tus ntiv tes tawm ntawm tus yuam sij hloov!

Vim li cas SQL sau ntawv loj?

SQL tau tsim nyob rau xyoo 1970 thaum cov lus programming nrov (xws li COBOL) siv TAG NRHO CAPS, thiab lub rooj sib tham yuav tsum tau daig. Nws yog vim qhov ntawd yog txoj hauv kev uas nws tau teev tseg hauv tus qauv ANSI.

Koj ua li cas loj hauv SQL?

Yog tias koj xav pom ib txoj hlua loj, siv tusSQL UPPER muaj nuj nqi. Qhov kev ua haujlwm no tsuas yog siv ib qho kev sib cav xwb: kab kab uas koj xav hloov mus rau qhov loj.

Pom zoo:

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Feem ntau, lawv tshwm sim los ntawm kev ntxhov siab thiab kev ntxhov siab, lossis vim tias koj tau muaj caffeine, nicotine, lossis cawv ntau dhau lawm. Lawv kuj tuaj yeem tshwm sim thaum koj cev xeeb tub. Muaj tsawg zaus, palpitations tuaj yeem yog ib qho cim ntawm lub plawv mob hnyav dua.