dynamic sql in oracle

variables instead of placeholders in the form of "using Var1,var2,..."V_sql: = ' Select decode (Length (: v1), 10,:v2,:v3) from dual '; EXECUTE IMMEDIATE v_sql into V_start USING V_start,v_start | | ' 00:00:00 ', V_start;Results show:4. TestingEnter the parameterOut parameter5. The simplest way--End time stitching ' 00:00:00 ' SELECT DECODE (LENGTH (V_end), ten, V_end | | ' 00:00:00 ', v_end) into the v_end from DUAL;Related recommendations: Exception pls-00403:expression ' V_end ' can

ORACLE cannot use variables as column names and table names some of the individual validations are:1 DECLARE2Ename1 Emp.ename%TYPE;3TYPE Index_emp_type is TABLE of VARCHAR2( -)INDEX byPls_integer;4 index_emp Index_emp_type;5 BEGIN 6Index_emp (1) := 'E.ename';7 SELECTIndex_emp (1) intoEname1 fromEMP EWHEREE.empno=7369;8 EXECUTEIMMEDIATE'Select' ||Index_emp (1)|| 'From emp e where e.empno=7369' intoename1;9Dbms_output.put_line (Index_emp (1));Ten Dbm

a string as the Insert field String linecolumn = ""; concatenation of SQL, as part of the INSERT statement [Java] view plaincopy map Here the line) ID is a self added field, the direct write sequence in the statement will be an error, so first traversing the list will be taken out of the value as result, take out all the values of result, together with the sequence as the value of the insert. Using two foreace nesting when the value i

First look at how SQL writesSelect * from ( Select A.*, ROWNUM rn from (lowest query statement ) A wherelt; = #{endcol} ) where gt; #{startcol}Note: Of course we also need select COUNT (*) the lowest query statement to get the total number of result sets. And then convert the Endcol and Startcol.The conversion code is as follows://int totalrecord= tota

First of all, the so-called SQL dynamic and static, refers to when SQL statements are compiled and executed, both are used in SQL embedded programming, which is referred to as embedded refers to the SQL statement embedded in the high-level language, rather than the type of m

Oracle dynamic display log, oracle dynamic log 1. view the location of the log file; IND_USER @ PROD> select inst_id, name, value from v $ diag_info; INST_ID NAME VALUE--------------------------------------------------------------------------------1 Diag Enabled TRUE1 ADR Base/u01/app/oracle1 ADR Home/u01/app/

Cursor and dynamic SQL, cursor dynamic SQL Cursor type: Static cursor (the cursor is statically bound to a select statement during compilation. This cursor can only act on one query statement) and dynamic cursors (that is, we want our query statements to be bound to the curs

Label:Dynamic Statement Basic syntax:1: Normal SQL statements can be executed with execSELECT * from TableName exec (' select * from TableName ')EXEC sp_executesql n ' select * from TableName '--please note that the string must be added n before2: Field name, table name, database name, etc. as variables, you must use dynamicSQL declare @fname varchar set @fname = ' Filedname ' Select @fname from TableName-error, no error is indicated, but the result i

Label:Next: T-SQL Dynamic Query (3)--Static SQLObjective: There's a lot of talk about dynamic queries, and this article describes some of the ways to use dynamic SQL to solve dynamic queries.Why use

JDBC connection pool and dynamic SQL processing, jdbc dynamic SQLReview: 1. Create a properties configuration file first. ClasssName = oracle. jdbc. driver. oracleDriverurl = jdbc: oracle: thin: @ Server IP: Port: Name user = set Username password = set password maxActive =

Use dynamic SQL statements (using dynamic SQL), sqlsa, and sqlda I. General informationBecause database applications usually perform a specific activity, you usually know the complete SQL statement when you write and compile the script. When PowerBuilder does not support the

Abstract: In the PL/SQL development process, SQL, PL/SQL can be used to meet most of the requirements. However, in some special cases, standard SQL statements or DML statements in PL/SQL cannot meet your needs. For example, dynamic