once every second. Once the execution ends, monitoring information is not deleted immediately. Instead, it is kept in V$SQL_MONITOR for at least one minute. The entry will eventually be deleted to reclaim its s
Defines a collection to be selected from the given cursor, used only with SELECT statementsdbms_sql.define_array ( c IN INTEGER, position IN INTEGER, IN <datatype> cnt IN INTEGER, lower_bnd IN INTEGER); DECLARE c number; d number; n_tab dbms_sql.number_table; indx number := -10;...
DBMS_SQL.OPEN_CURSOR RETURN INTEGER; ParametersNone. Pragmaspragma restrict_references(open_cursor,RNDS,WNDS); ReturnsThis function returns the cursor ID number of the new cursor. PARSE procedure This procedure parses the given statement in the given cursor. All statements are parsed immediately. ...
ADD PARTITION statements), unless you specify TABLESPACE in the PARTITION description. See Also: CREATE TABLESPACE for more information on tablespaces logging_clause Specify whether the creation of the table (and any indexes required because of constraints), partition, or LOB storage characteristics ...
对可以分组到批的 SQL 语句类型有一些限制。 有关详细信息,请参阅Batches of Statements。 如果执行 SQL 任务运行一个 SQL 语句批,则下列规则适用于批: 只有一个语句可以返回结果集,且该语句必须是批中的第一个语句。 如果结果集使用结果绑定,则查询必须返回相同数量的列。 如果查询返回不同数量的列,则任务失败...
SQL_CU_DML_STATEMENTS = 所有数据操作语言语句都支持目录:SELECT、INSERT、UPDATE、DELETE;如果受支持,则SELECT FOR UPDATE 和定位更新和删除语句。SQL_CU_PROCEDURE_INVOCATION = ODBC 过程调用语句支持目录。SQL_CU_TABLE_DEFINITION = 所有表定义语句都支持目录:CREATE TABLE、CREATE VIEW、ALTER TABLE、DROP TABLE ...
statements; ... WHEN OTHERS THEN statements; END; / 三、异常处理示例 1.预定义异常的例子 --演示一个整除的异常 DECLARE v_n1 NUMBER:=50; v_n2 NUMBER:=0; v_n3 NUMBER; BEGIN v_n3:=v_n1/v_n2; DBMS_OUTPUT.PUT_LINE('v_n3='||v_n3); EXCEPTION...
FOR EACH ROW: 行级监视,Mysql 固定写法,其他 DBMS 不同。 trigger_statements: 触发器执行动作。是一条或多条 SQL 语句的列表,列表内的每条语句都必须用分号;来结尾。 示例: DELIMITER $ CREATE TRIGGER `trigger_insert_user` AFTER INSERT ON `user` ...
首先是数据库管理系统，简称数据库，也就是DBMS，这是数据库的管理软件。市场上有很多选择，比如MySQL、...
In SQL statements, you can access tables from different databases with thedb_name.tbl_namesyntax. Some SQL servers provide the same functionality but call thisUser space. MySQL Server doesn't support tablespaces such as used in statements like this:CREATE TABLE ralph.my_table ... IN my_tables...