Learn what is Cursor in SQL with the help of examples. SQL cursor is a database object that is used to manipulate and traverse the result set of a SELECT query.
Oracle 模式下开启 PS 和 cursor,SQL Audit 记录的 PARAMS_VALUE 是空的。 以下例子以 OceanBase 数据库 V3.2.3 BP8 (oceanbase-3.2.3.3-108000062023041511) 版本和 OceanBase Connector/J V2.4.1 版本为例进行说明。 创建测试方法 testPs()。 @Test public void testPs(){ Connection conn; Connection conn...
SELECT * FROM dm_info WHERE `name` LIKE "1" or 1=1 or "%" #曾" or 1=1 or `name` = " SELECT DISTINCT major FROM dm_info #DISTINCT 去除重复的数据 --- union full union SELECT batch FROM dm_info SELECT COUNT(batch) FROM dm_info SELECT AVG( batch) FROM dm_info #GROUP BY 分...
ObjectName: Name=select/*+ test_sql_cursor */ e.ename,d.deptno,d.dname from emp e,dept d where e.deptno=d.deptno and e.empno=:b_empno FullHashValue=dc2fade63f4e3fd7bc63a0450bd763bd Namespace=SQL AREA(00) Type=CURSOR(00) Identifier=198665149 OwnerIdn=43 Statistics: InvalidationCount=...
syntaxsql Көшіру sp_help_fulltext_columns_cursor [ @cursor_return = ] cursor_return OUTPUT [ , [ @table_name = ] N'table_name' ] [ , [ @column_name = ] N'column_name' ] [ ; ] Аргументы[ @cursor_return = ] cursor_return OUTP...
定义游标---Cursor [Cursor Name] IS; 打开游标---Open [Cursor Name]; 操作数据---Fetch [Cursor name] 关闭游标---Close [Cursor Name],这个Step绝对不可以遗漏。 (3)以下是三种常见显式Cursor用法。 1) Sql代码 Set serveroutput on; ...
Supporting different levels of visibility to changes made to the database data by other users that is presented in the result set. Note For a full description of the SQL Server cursor types, see Type of Cursors. The JDBC specification provides support for forward-only and scrollable cursors tha...
Supporting different levels of visibility to changes made to the database data by other users that is presented in the result set. Note For a full description of the SQL Server cursor types, seeType of Cursors. The JDBC specification provides support for forward-only and scrollable cursors that...
DELIMITER // CREATE PROCEDURE process_data() BEGIN DECLARE done INT DEFAULT FALSE; DECLARE v_id INT; DECLARE v_name VARCHAR(255); DECLARE cur CURSOR FOR SELECT id, name FROM your_table; DECLARE CONTINUE HANDLER FOR NOT FOUND SET done = TRUE; OPEN cur; read_loop: LOOP FETCH cur INTO v...
The MySQL client/server protocol has an option to send prepared statement parameters via theCOM_STMT_SEND_LONG_DATAcommand. To use this from Connector/Python scripts, send the parameter in question using theIOBaseinterface. Example: