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A sequence was created with the DDL statement shown below:CREATE SEQUENCE my_seq START WITH 5 INCREMENT BY 5 CACHE 5 User1 successfully executes the following statements in Connection1: VALUES NEXT VALUE FOR my_seq INTO :con1hvar VALUES NEXT VALUE FOR my_seq INTO :con1hvar User2 successfully executes the following statement in Connection2: VALUES NEXT VALUE FOR my_seq INTO :con2hvar After User1 & User2 are finished, User3 executes the following statement in Connection3: SELECT NEXT VALUE FOR my_seq FROM sysibm.sysdummy1Which value will be returned by the query?（）
- A、20
- B、25
- C、50
- D、55
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更多 “A sequence was created with the DDL statement shown below:CREATE SEQUENCE my_seq START WITH 5 INCREMENT BY 5 CACHE 5 User1 successfully executes the following statements in Connection1: VALUES NEXT VALUE FOR my_seq INTO :con1hvar VALUES NEXT VALUE FOR my_seq INTO :con1hvar User2 successfully executes the following statement in Connection2: VALUES NEXT VALUE FOR my_seq INTO :con2hvar After User1 User2 are finished, User3 executes the following statement in Connection3: SELECT NEXT VALUE FOR my_seq FROM sysibm.sysdummy1Which value will be returned by the query?（）A、20B、25C、50D、55” 相关考题
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Which of the following is a characteristic of a sequence?()
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A sequence was created with the DDL statement shown below:CREATE SEQUENCE my_sequence CACHE 10 ORDER The following statements are successfully executed in sequence through separate database connections: CONNECTION1 - VALUES NEXT VALUE FOR my_sequence INTO :con1hvar CONNECTION2 - VALUES NEXT VALUE FOR my_sequence INTO :con2hvar CONNECTION1 - VALUES NEXT VALUE FOR my_sequence INTO:con1hvarWhat is the current value of the :con1hvar host variable?（）A、2B、3C、11D、30
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What is true about sequences?（）A、Once created, a sequence belongs to a specific schema.B、Once created, a sequence is linked to a specific table.C、Once created, a sequence is automatically available to all users.D、Only the DBA can control which sequence is used by a certain table.E、Once created, a sequence is automatically used in all INSERT and UPDATE statements.
考题
单选题You create a data block based on a relation table containing a REF column. You select the REF column for your form module. Which statement about the REF column is true?（）A
It is created as a nondisplay item. B
The Lock Record property is set to Yes. C
It cannot be referenced in item level triggers. D
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考题
单选题Which of the following is a characteristic of a sequence?（）A
A sequence will never generate duplicate valuesB
The MAXVALUE of a sequence can be equal to the MINVALUEC
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When a sequence cycles back to either the MAXVALUE or MINVALUE, it will always be equal to the specified value of either of these two boundaries
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考题
单选题What is true about sequences?（）A
The start value of the sequence is always 1.B
A sequence always increments by 1.C
The minimum value of an ascending sequence defaults to 1.D
The maximum value of descending sequence defaults to 1.
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多选题Which two statements about sequences are true? （）AYou use a NEXTVAL pseudo column to look at the next possible value that would be generated from a sequence, without actually retrieving the value.BYou use a CURRVAL pseudo column to look at the current value just generated from a sequence, without affecting the further values to be generated from the sequence.CYou use a NEXTVAL pseudo column to obtain the next possible value from a sequence by actually retrieving the value from the sequence.DYou use a CURRVAL pseudo column to generate a value from a sequence that would be used for a specified database column.EIf a sequence starting from a value 100 and incremented by 1 is used by more than one application, then all of these applications could have a value of 105 assigned to their column whose value is being generated by the sequence.FYou use a REUSE clause when creating a sequence to restart the sequence once it generates the maximum value defined for the sequence.
考题
多选题Examine the structure of the EMPLOYEES table: EMPLOYEE_ID NUMBER NOT NULL, Primary Key EMP_NAME VARCHAR2(30) JOB_ID NUMBER/ SAL NUMBER MGR_ID NUMBER References EMPLOYEE_ID column DEPARTMENT_ID NUMBER Foreign key to DEPARTMENT_ID column of the DEPARTMENTS table You created a sequence called EMP_ID_SEQ in orderto populate sequential values for the EMPLOYEE_ID column of the EMPLOYEES table. Which two statements regarding the EMP_ID_SEQ sequence are true? （）AYou cannot use the EMP_ID_SEQ sequence to populate the JOB_ID column.BThe EMP_ID_SEQ sequence is invalidated when you modify the EMPLOYEE_ID column.CThe EMP_ID_SEQ sequence is not affected by modifications to the EMPLOYEES table.DAny other column of NUMBER data type in your schema can use the EMP_ID_SEQ sequence.EThe EMP_ID_SEQ sequence is dropped automatically when you drop the EMPLOYEES table.FThe EMP_ID_SEQ sequence is dropped automatically when you drop the EMPLOYEE_ID column.
考题
单选题You are granted the CREATE VIEW privilege. What does this allow you to do?（）A
Create a table view.B
Create a view in any schema.C
Create a view in your schema.D
Create a sequence view in any schema.E
Create a view that is accessible by everyone.F
Create a view only of it is based on tables that you created.
考题
单选题What is true about sequences? （）A
Once created, a sequence belongs to a specific schema.B
Once created, a sequence is linked to a specific table.C
Once created, a sequence is automatically available to all users.D
Only the DBA can control which sequence is used by a certain table.E
Once created, a sequence is automatically used in all INSERT and UPDATE statements.
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