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SQL statements were executed in the following order:
CREATE TABLE fmaster (id INTEGER PRIMARY
KEY, name TEXT);
CREATE TABLE ftrans (id INTEGER REFERENCES fmaster (id), stat
INTEGER, date DATE); INSERT INTO fmaster VALUES (1, 'itemA'); INSERT
INTO ftrans VALUES (1, 1, CURRENT_DATE); Select the two SQL statements that will generate an error when executed next.
Answer : B, C
Select two incorrect statements regarding large objects.
Answer : C, E
Select two incorrect descriptions regarding the following SQL statements.
CREATE TABLE cities ( name text,
population float ); CREATE
TABLE capitals ( state
char(2) ) INHERITS
(cities);
Answer : C, E
Select two SQL statements which abort a transaction.
Answer : B, D
The table "custom" is defined below. The "id" column and "introducer" column are of
INTEGER type, and the "email" column is of TEXT type.
id | email | introducer ----+-- ---------------+-----------2 |
aaa@example.com | 1 3 |
bbb@example.com | 2 4 |
ccc@example.com | 2
Three SQL statements were executed in the following order:
UPDATE custom SET email = '' FROM custom c WHERE
custom.introducer = c.id; UPDATE custom SET introducer = NULL
WHERE introducer NOT IN (SELECT id FROM custom); DELETE
FROM custom WHERE id = 2 OR introducer = 2; Select the number of rows in the "custom" table after the execution.
Answer : A
