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YouTubeTech Nova IQ
NULL vs 0 in SQL — Most Devs Wrong #sqlnull #nullhandling #sqlmistakes #sqltips
NULL is NOT empty. NULL is NOT zero. It's unknown — and that one difference silently breaks your SQL queries every day. In this Short you'll learn the most common NULL handling mistakes in SQL Server: why WHERE col = NULL always returns zero rows, how NULL propagates through arithmetic and string operations, and how to fix it instantly with ...
116 views3 months ago
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jom belajar excel, powerbi dan SQL bulan July? boleh guna kod JUNE49 untuk combo 2 kelas to get discount dan JUNE100 untuk combo 3 kelas ya. sesuai untuk semua intern, fresh grad, unemployed, yang menganggur kita akan start belajar dari level basic #dataanalysis #microsoftpowerbi #microsoftexcel #sql #freshgrad #kelasonline
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