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Systemy Keruvannya Bazamy Danykh: MySQL, OLAP, Null, Firebird, Microsoft SQL Server, Informix, PostgreSQL, OLAP-Kub, Mariadb, Sqlite

Dzherelo Wikipedia
4.9/5 (32120 ratings)
Read Now Download Now ⏭ listen AudioBook
Description:Dzherelo: Wikipedia. Storinky: 27. Hlavy: MySQL, OLAP, Null, Firebird, Microsoft SQL Server, Informix, PostgreSQL, OLAP-kub, MariaDB, SQLite, Systema keruvannya bazamy danykh, Drizzle, Relyatsiy na alhebra, CDS/ISIS, ACID, ODBC, PhpMyAdmin, Superklyuch, Microsoft Access, Kexi, Relyatsiy na SKBD, EnterpriseDB Advanced Server, SQL Server Integration Services, Oracle, CRUD, HSQLDB, Pohlyad, Amazon S3, DB2. Vytyah: Null - spetsial na poznachka, yaka vykorystovuyet sya v SQL dlya poznachennya toho, shcho znachennya ne isnuye v bazi danykh. Vvedeno vynakhidnykom relyatsiy noi modeli danykh Edharom Koddom, SQL Null sluhuye dlya vykonannya vymohy, shcho vsi diy sno relyatsiy ni systemy keruvannya bazamy danykh (RSKBD) pidtrymuyut predstavlennya -vidsutn oi i neprydatnoi informatsii -. Kodd takozh vviv vykorystannya maloi litery hrets koi omeha ( ) yak symvola dlya predstavlennya Null v teorii baz danykh. NULL takozh ye zarezervovanym slovom v SQL, yake vkazuye na spetsial nu poznachku Null. Null buv prychynoyu superechok i debativ cherez svoyu asotsiatsiyu z triy kovoyu lohikoyu, osoblyvykh vymoh z y oho vykorystannya v instruktsii SQL JOIN, i spetsial noi obrobky ahrehatnymy funktsiyamy ta operatoramy hrupuvannya SQL. Khocha osoblyvi funktsii ta predykaty pravyl no obroblyayut Null, oponenty vidchuvayut, shcho pidtrymka tsiyei mozhlyvosti vvodyt nepotribnu skladnist i superechlyvist v relyatsiy nu model danykh. Null buv vvedenyy Edharom Koddom yak zasib dlya predstavlennya vidsutnikh danykh v relyatsiy niy modeli nezalezhno vid typu danykh. Vpodal shomu vin opublikuvav svoyu stattyu v dvokh chastynakh v chasopysi ComputerWorld, v tsiy statti vin prezentuvav 12 pravyl za yakymy mozhna vyznachyty chy ye SKBD diy sno relyatsiy noyu. Kodd takozh vviv tryznachnu lohiku, yaka maye try znachennya istynnosti Istyna (True), Khyba (False) ta Nevidomo (Unknown), yaka duzhe blyz ka do kontseptsii Null. Znachennya Nevidomo heneruyet sya koly Null porivnyuyet sy...We have made it easy for you to find a PDF Ebooks without any digging. And by having access to our ebooks online or by storing it on your computer, you have convenient answers with Systemy Keruvannya Bazamy Danykh: MySQL, OLAP, Null, Firebird, Microsoft SQL Server, Informix, PostgreSQL, OLAP-Kub, Mariadb, Sqlite. To get started finding Systemy Keruvannya Bazamy Danykh: MySQL, OLAP, Null, Firebird, Microsoft SQL Server, Informix, PostgreSQL, OLAP-Kub, Mariadb, Sqlite, you are right to find our website which has a comprehensive collection of manuals listed.
Our library is the biggest of these that have literally hundreds of thousands of different products represented.
Pages
—
Format
PDF, EPUB & Kindle Edition
Publisher
Books LLC, Wiki Series
Release
2011
ISBN
1233828347

Systemy Keruvannya Bazamy Danykh: MySQL, OLAP, Null, Firebird, Microsoft SQL Server, Informix, PostgreSQL, OLAP-Kub, Mariadb, Sqlite

Dzherelo Wikipedia
4.4/5 (1290744 ratings)
Read Now Download now ⏭ listen AudioBook
Description: Dzherelo: Wikipedia. Storinky: 27. Hlavy: MySQL, OLAP, Null, Firebird, Microsoft SQL Server, Informix, PostgreSQL, OLAP-kub, MariaDB, SQLite, Systema keruvannya bazamy danykh, Drizzle, Relyatsiy na alhebra, CDS/ISIS, ACID, ODBC, PhpMyAdmin, Superklyuch, Microsoft Access, Kexi, Relyatsiy na SKBD, EnterpriseDB Advanced Server, SQL Server Integration Services, Oracle, CRUD, HSQLDB, Pohlyad, Amazon S3, DB2. Vytyah: Null - spetsial na poznachka, yaka vykorystovuyet sya v SQL dlya poznachennya toho, shcho znachennya ne isnuye v bazi danykh. Vvedeno vynakhidnykom relyatsiy noi modeli danykh Edharom Koddom, SQL Null sluhuye dlya vykonannya vymohy, shcho vsi diy sno relyatsiy ni systemy keruvannya bazamy danykh (RSKBD) pidtrymuyut predstavlennya -vidsutn oi i neprydatnoi informatsii -. Kodd takozh vviv vykorystannya maloi litery hrets koi omeha ( ) yak symvola dlya predstavlennya Null v teorii baz danykh. NULL takozh ye zarezervovanym slovom v SQL, yake vkazuye na spetsial nu poznachku Null. Null buv prychynoyu superechok i debativ cherez svoyu asotsiatsiyu z triy kovoyu lohikoyu, osoblyvykh vymoh z y oho vykorystannya v instruktsii SQL JOIN, i spetsial noi obrobky ahrehatnymy funktsiyamy ta operatoramy hrupuvannya SQL. Khocha osoblyvi funktsii ta predykaty pravyl no obroblyayut Null, oponenty vidchuvayut, shcho pidtrymka tsiyei mozhlyvosti vvodyt nepotribnu skladnist i superechlyvist v relyatsiy nu model danykh. Null buv vvedenyy Edharom Koddom yak zasib dlya predstavlennya vidsutnikh danykh v relyatsiy niy modeli nezalezhno vid typu danykh. Vpodal shomu vin opublikuvav svoyu stattyu v dvokh chastynakh v chasopysi ComputerWorld, v tsiy statti vin prezentuvav 12 pravyl za yakymy mozhna vyznachyty chy ye SKBD diy sno relyatsiy noyu. Kodd takozh vviv tryznachnu lohiku, yaka maye try znachennya istynnosti Istyna (True), Khyba (False) ta Nevidomo (Unknown), yaka duzhe blyz ka do kontseptsii Null. Znachennya Nevidomo heneruyet sya koly Null porivnyuyet sy...We have made it easy for you to find a PDF Ebooks without any digging. And by having access to our ebooks online or by storing it on your computer, you have convenient answers with Systemy Keruvannya Bazamy Danykh: MySQL, OLAP, Null, Firebird, Microsoft SQL Server, Informix, PostgreSQL, OLAP-Kub, Mariadb, Sqlite. To get started finding Systemy Keruvannya Bazamy Danykh: MySQL, OLAP, Null, Firebird, Microsoft SQL Server, Informix, PostgreSQL, OLAP-Kub, Mariadb, Sqlite, you are right to find our website which has a comprehensive collection of manuals listed.
Our library is the biggest of these that have literally hundreds of thousands of different products represented.
Pages
—
Format
PDF, EPUB & Kindle Edition
Publisher
Books LLC, Wiki Series
Release
2011
ISBN
1233828347

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