Introduction to SQL What operator tests column for the absence of data? NOT operator None of these IS NULL operator EXISTS operator NOT operator None of these IS NULL operator EXISTS operator ANSWER DOWNLOAD EXAMIANS APP
Introduction to SQL 'AS' clause is used in SQL for Selection operation. Rename operation. Join operation. Projection operation. Selection operation. Rename operation. Join operation. Projection operation. ANSWER DOWNLOAD EXAMIANS APP
Introduction to SQL NULL is the same as 0 for integer the same as blank for character the same as 0 for integer and blank for character not a value the same as 0 for integer the same as blank for character the same as 0 for integer and blank for character not a value ANSWER DOWNLOAD EXAMIANS APP
Introduction to SQL Indexes can usually be created for both primary and secondary keys. False True False True ANSWER DOWNLOAD EXAMIANS APP
Introduction to SQL The wildcard in a WHERE clause is useful when? An exact match is necessary in a CREATE statement. An exact match is necessary in a SELECT statement. An exact match is not possible in a CREATE statement. An exact match is not possible in a SELECT statement. An exact match is necessary in a CREATE statement. An exact match is necessary in a SELECT statement. An exact match is not possible in a CREATE statement. An exact match is not possible in a SELECT statement. ANSWER DOWNLOAD EXAMIANS APP
Introduction to SQL The HAVING clause does which of the following? Acts EXACTLY like a WHERE clause. Acts like a WHERE clause but is used for groups rather than rows. Acts like a WHERE clause but is used for columns rather than groups. Acts like a WHERE clause but is used for rows rather than columns. Acts EXACTLY like a WHERE clause. Acts like a WHERE clause but is used for groups rather than rows. Acts like a WHERE clause but is used for columns rather than groups. Acts like a WHERE clause but is used for rows rather than columns. ANSWER DOWNLOAD EXAMIANS APP
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