dept_record RECORD; BEGIN cur :='SELECT * FROM departments'::REFCURSOR; LOOP FETCH cur INTO dept_record; EXIT WHEN cur%NOTFOUND; RAISE NOTICE '部门:% (人数:%)', dept_record.dept_name, dept_record.employee_count; END LOOP; END $$; 三、高级应用场景 批量数据操作 CREATE OR REPLACE PROCE...
mv_record RECORD; BEGIN FOR mv_record IN SELECT viewnameFROMpg_views WHERE viewname LIKE 'v_report_%' LOOP EXECUTE 'REFRESH MATERIALIZED VIEW ' || mv_record.viewname; END LOOP; END $$; 总结 GaussDB视图管理需要把握三个核心维度: 抽象层次:根据业务需求选择标准视图/物化视图 ...
SQL Server Select the first record of a query with an in condition [duplicate]To retrieve the l...
SSMA for Oracle 的 2012 年 1 月版本添加了对 RowType 和RecordType 输入参数默认为 NULL 的支持。 2011 年 7 月 SSMA for Oracle 的 2011 年 7 月版本包含以下更改: 添加了对将 Oracle 序列转换为 SQL Server 2012 (11.x) 序列生成器的支持。 改进了数据迁移期间的错误报告。 改进了使用保留字的语句...
Whether to have depth-first, breadth-first, or both, and which to make the clustering key (if any), depends on the relative importance of the above types of queries, and the relative importance of SELECT vs. DML operations. For a detailed example of indexing strategies, see Tutorial: Using...
Change Data Type of data retrieved by SELECT query change first letter in uppercase and and rest lowercase Change font colour in table cell based on SQL Query in SQL Email Change index of all tables, in at the databases on a server. change Minutes and seconds of a datetime value to 0 ...
SQL3055NThe input file is not a valid PC/IXF file. The length field in the first record cannot be converted to a numeric value. Explanation The value in the length field of the first record is not the ASCII representation of a number. The file may not be a PC/IXF file. ...
开启:dbms_monitor.session_trace_enable(session_id => 127,serial_num => 29,waits => TRUE,binds => FALSE,plan_stat => 'first_execution') plan_stat:默认null相等于first_execution SELECT sql_trace, sql_trace_waits, sql_trace_binds, sql_trace_plan_stats FROM v$session WHERE sid = 127; ...
Record the message number (SQLCODE) and error in this message. If trace was active, invoke the Independent Trace Facility at the operating system command prompt. Then contact your technical service representative with the following information: ...
{conststringconnectionString ="...";conststringqueryString ="SELECT * FROM Products";// create DataAdapterSqlDataAdapter adapter =new(queryString, connectionString); SqlCommandBuilder builder =new(adapter);// Create and fill DataSet (select only first 5 rows)DataSet dataSet =new(); adapter.Fill(...