单项选择题
A. CREATE TABLE EMP9$# AS (empid number(2)); B. CREATE TABLE EMP*123 AS (empid number(2)); C. CREATE TABLE PACKAGE AS (packid number(2)); D. CREATE TABLE 1EMP_TEST AS (empid number(2));
Which two are character manipulation functions?（）A. TRI...
多项选择题Which two are character manipulation functions?（）
A. TRIM B. REPLACE C. TRUNC D. TO_DATE E. MOD F. CASE
Which three are true?（）A. A MERGE statement is used to ...
多项选择题Which three are true?（）
A. A MERGE statement is used to merge the data of one table with data from another. B. A MERGE statement replaces the data of one table with that of another. C. A MERGE statement can be used to insert new rows into a table. D. A MERGE statement can be used to update existing rows in a table.
Evaluate this SQL statement: In the statement, which c...
Evaluate this SQL statement: In the statement, which capabilities of a SELECT statement are performed?（）
A. Selection, projection, join B. Difference, projection, join C. Selection, intersection, join D. Intersection, projection, join E. Difference, projection, product
