An index called ORD_CUSTNAME_IX has been created on the CUSTNAME column in the ORDERS table using the following command： SQL>CREATE INDEX ord_custname_ix ON orders（custname）； The ORDERS table is frequently queried using the CUSTNAME column in the WHERE clause. You want to check the impact on the performance of the queries if the index is not available. You do not want the index to be dropped or rebuilt to perform this test. Which is the most efficient method of performing this task？（） [" disabling the index"," making the index invisible"," making the index unusable"," using the MONITORING USAGE clause for the index"]
影响再结晶温度的因素是
You want to use the SQL Tuning Advisor to generate recommendations for badly written SQL statements in your development environment. Which three sources can you select for the advisor to analyze？（） [" Top SQL"," snapshots"," SQL Tuning sets"," index access path"," optimizer statistics"," materialized view log"]
You want to capture column group usage and gather extended statistics for better cardinality estimates for the CUSTOMERS table in the SH schema. Examine the following steps: 1. Issue the SELECT DBMS_STATS.CREATE_EXTENDED_STATS (‘SH’, ‘CUSTOMERS’) FROM dual statement. 2. Execute the DBMS_STATS.SEED_COL_USAGE (null, ‘SH’, 500) procedure. 3. Execute the required queries on the CUSTOMERS table. 4. Issue the SELECT DBMS_STATS.REPORT_COL_USAGE (‘SH’, ‘CUSTOMERS’) FROM dual statement. Identify the correct sequence of steps.（） ["3，2，1，4","2，3，4，1","4，1，3，2","3，2，4，1"]
In a typical production environment， which server（s） hosts the application ？（） [" Node Server"," Administration Server"," Managed Server"," Configuration Server"]
简述Edit组件这几个属性的用途：Font、Hint、Name、ReadOnly、Text
