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（）name is Wanghua.
- A、He
- B、He’s
- C、His
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更多 “（）name is Wanghua.A、HeB、He’sC、His” 相关考题
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You are developing a Windows Forms application that contains a DataGridView control. The DataGridView capture the customer's name, address, and phone number. You have been asked to provide data validation in a DataGridView to prevent users from leaving the.. You need to ensure that users cannot tab out of the name field without entering data What should you do ?（）A、Validate the name field in the CellValidating event. Set e.Cancel = true if the name field isB、Validate the name field in the CellErrorTextChanged event. Get e.RowIndex if the name field ..C、Validate the name field in the CellEnter event. Set the focus on the name field if the name ...D、Validate the name field in the CancelRowEdit event. Set the focus on the name field if the name ...
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单选题Which syntax turns an existing constraint on? （）A
ALTER TABLE table_name ENABLE constraint_name;B
ALTER TABLE table_name STATUS = ENABLE CONSTRAINT constraint _ name;C
ALTER TABLE table_name ENABLE CONSTRAINT constraint _ name;D
ALTER TABLE table_name TURN ON CONSTRAINT constraint _ name;
考题
单选题Which statement adds a constraint that ensures the CUSTOMER_NAME column of the CUSTOMERS table holds a value?（）A
ALTER TABLE customers ADD CONSTRAINT cust_name_nn CHECK customer_name IS NOT NULL;B
ALTER TABLE customers MODIFY CONSTRAINT cust_name_nn CHECK customer_name IS NOT NULL;C
ALTER TABLE customers MODIFY customer_name CONSTRAINT cust_name_nn NOT NULL;D
ALTER TABLE customers MODIFY customer_name CONSTRAINT cust_name_nn IS NOT NULL;E
ALTER TABLE customers MODIFY name CONSTRAINT cust_name_nn NOT NULL;F
ALTER TABLE customers ADD CONSTRAINT cust_name_nn CHECK customer_name NOT NULL;
考题
单选题Which syntax turns an existing constraint on?（）A
ALTER TABLE table_name ENABLE constraint_name;B
ALTER TABLE table_name STATUS = ENABLE CONSTRAINT constraint_name;C
ALTER TABLE table_name ENABLE CONSTRAINT constraint_name;D
ALTER TABLE table_name STATUS ENABLE CONSTRAINT constraint_name;E
ALTER TABLE table_name TURN ON CONSTRAINT constraint_name;
考题
单选题Examine the structure of the EMPLOYEES table: Column name Data type Remarks EMPLOYEE_ID NUMBER NOT NULL, Primary Key LAST_NAME VARCNAR2(30) FIRST_NAME VARCNAR2(30) JOB_ID NUMBER SAL NUMBER MGR_ID NUMBER References EMPLOYEE_ID column DEPARTMENT_ID NUMBER You need to create an index called NAME_IDX on the first name and last name fields of the EMPLOYEES table. Which SQL statement would you use to perform this task?（）A
CREATE INDEX NAME _IDX (first_name, last_name);B
CREATE INDEX NAME _IDX (first_name, AND last_name)C
CREATE INDEX NAME_IDX ON (First_name, last_name);D
CREATE INDEX NAME_IDX ON employees (First_name, AND last_name);E
CREATE INDEX NAME_IDX ON employees (First_name, last_name);F
CREATE INDEX NAME_IDX FOR employees (First_name, last_name);
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