dynamic sql in oracle

In general PL/SQL programming, SQL can be directly used in DML and transaction control statements, but DDL statements and system control statements cannot be directly used in PL/SQL, to use DDL statements and system control statements in PL/SQL, you can use dynamic

supports no services The command completed successfully The above information shows several details: Ü we configured a custom listener my_listener In the listener. ora file to listen to port 1531. However, the current default listener still exists and can run on port 1521. The my_listener listener runs on port 1531; Ü the Dynamic Registration of Oracle instances is performed on the listener on port 1521, a

variable, but the variable needs to be defined before the cursor and assigned before the cursor is opened. The above examples are revised as follows: "Training 2" passes arguments to the cursor through a variable. SET serveroutput on DECLARE v_empno number (5); V_ename VARCHAR2 (a); V_deptno number (5); V_job VARCHAR2 (a); CURSOR emp_cursor is SELECT empno, ename from emp WHERE deptno = v_deptno and job = V_job;

1. static sqlsql and dynamic SQLThe Oracle compiled PL/SQL program block is divided into two types: one for the pre-assembly (early binding), that is, the SQL statement is determined during program compilation, most of the compilation is of this type, and the other is the late-linking (late binding), That is,

Development Description: during SAP system maintenance, sometimes we need to modify some table data, but many tables cannot be directly modified in tcode: SE16, the sap id used does not have the permission to modify the debugging data. How can we modify the data? Idea --> ABAP Program All SQL update statements in are permitted to be executed, as long as we can dynamically generate the ABAP code to modify the table field for

Label:In our familiar hibernate mapping file There is also a lot of space, many worthy of my attention.The class tag of the hibernate mapping file uses Dynamic-insert,dynamic-update to optimize the generated SQL statements, improve the efficiency of SQL execution, and ultimately improve system performance.For example,

Development Description: during SAP system maintenance, sometimes we need to modify some table data, but many tables cannot be directly modified in tcode: SE16, the sap id used does not have the permission to modify the debugging data. How can we modify the data? Idea --> All SQL update statements in the ABAP program have the permission to execute, as long as we can dynamically generate the ABAP code to modify the table field for

. The default sampling level for ORACLE 11g is 2, which is typically used to modify the dynamic sampling level using the dynamic_sampling hint in the session.②: There are pros and cons, and dynamic sampling is not an artifact. The more data blocks it samples, the greater the overhead, which increases the time for SQL

Part of the Adaptive Execution plan, part of the adaptive statistics. Notice here,Adaptive plans– was changed from default plan to adaptive plan the first time it was executed.Automatic re-optimization-it was at the second execution.Statistics Feedback formerly called cardinality FeedbackDynamic Statistics formerly called Dynamic samplingSQL Plan directives (SPD) so far as 12.1, you can think of the persistence of

Tags: Microsoft CTI object Complex problem: Lis use parameter BinThis article belongs to theUnderstand the mysteries of performance-slow in applications, fast in SSMS"seriesNext: Understanding the Mysteries of performance-application slow, SSMs fast (5)--case: How to deal with parameter sniffing We put aside the argument sniffing topic and went back to the original point of concern in this series: Why is the statement slow in the application, but fast in ssms? So far, it's all about the stored p

SQL Server dynamic query (table name or field dynamic), and get the desired return value result (Exec sp_execute Key words: In the preparation of SQL statements or stored procedures, it is inevitable that the table name or a field name in the statement is not sure. In this case, we should co

Security ON: Local OS Authentication SNMP OFF Listener Parameter File/u01/app/oracle/product/11.2.0/dbhome_1/network/admin/listener. ora Listener Log File/u01/app/oracle/diag/tnslsnr/aaalife/listener/alert/log. xml Listening Endpoints Summary... (DESCRIPTION = (ADDRESS = (PROTOCOL = tcp) (HOST = localhost) (PORT = 1531 ))) (DESCRIPTION = (ADDRESS = (PROTOCOL = ipc) (KEY = EXTPROC1531 ))) The listener suppo

Source: http://www.dbasupport.com/oracle/ora9i/execute_immediate.shtml Reposted from: lovexueer's blog Execute immediate replaces dbms_ SQL package in Oracle8i. it parses and immediately executes dynamic SQL statements or PL/SQL blocks created when they are not running. the

Share the correct way for SQL Server to execute dynamic SQL, serversql What should I do if SQL Server executes dynamic SQL statements? The following describes the two correct ways for SQL