Db2 luw insert statement

The INSERT statement inserts rows into a table, nickname, or view, or the underlying tables, nicknames, or views of the specified fullselect. Inserting a row into a nickname inserts the row into the data source object to which the nickname refers. To add a single row or multiple rows to a table or view, use a form of the INSERT statement. Does DBhave an insert or update.

DBcan re-use SQL statements that are executed repeatedly. If they differ (even by, say, the value of a literal in an INSERT statement ), then the statement needs to be recompiled from scratch. Because INSERTs are typically very simple to execute, the time spent to compile them can represent a big chunk of total execution time. The parallel INSERT feature additionally parallelizes the INSERT within each database partition when Intra-Query parallelism is configured.

In prior versions of DBand when the parallel INSERT feature is disable while the query portion of the INSERT statement is parallelize the INSERT itself is executed serially. Statement preparation Being an SQL statement , an INSERT statement must be compiled by DBbefore it’s executed. This can take place automatically (e.g., in CLP, or a CLI SQLExecDirect call), or explicitly (e.g., through an SQL Prepare statement , CLI SQLPrepare, or JDBC prepareStatement). The table or view can be at the current server or any DBsubsystem with which the current server can establish a connection.

Answer: It is possible to create a loop in DBwhich loops through an incremental INSERT. This is a basic example, which can be customised for your purposes. Question: I’d like write a sql statement to loop through an INSERT statement and increment with a count. Is it possible to generate automatic script for insert statement ? The purpose is to create some test tables for load testing.

For eg: If i am executing the below statement ,it returns some set of values. Whether can have a set of insert statement based on the above result sets? However I do not know whether or not EXPLAIN also includes the cost additional indexes incur on INSERT (and UPDATE) statements. I have created a test insert statement but it shows the same cost in timerons regardless of the indexes I create on a certain table.

While the VALUES clause in DBLUW says “ Introduces one or more rows of values to be inserted. DBLUW Platform - Replace LOAD statement with a cursor. When a target of insert into statement is a generated table created by values clause containing multiple rows DBmight crash instead of returning syntax error. Note that use of generated table as a target of insert into statement is not semantically valid and should return error. Question: I’m making a change to DBLUW database table – and would like to first backup the table – before I make the change.

What is a method for backing up a table and data? Answer: This method will create the table LIKE the source table , and then the INSERT statement will take all the data from the source table and INSERT into the target table. With this feature enable the INSERT portion of the query uses multiple threads to insert the data to speed up the elapsed time of the statement. For example, if someone issues a statement UPDATE Table1.

I got a some javascript Dojo code assembling a query from JSON variables and I have been trying to insert a timestamp in it. This is my test table (schema.mdummy): k and v are varchars. DBtriggers are sometimes over-used and over-complicated. Basically, triggers are actions(SQL) that take place when a triggering action occurs.

For DB, the valid triggering actions are on a table basis. No you cannot, DBmanuals say, Quote: There are three forms of this statement : - The INSERT via VALUES form is used to insert a single row into the table or view using the values provided or referenced. The INSERT via SELECT form is used to insert one or more rows into the table or view using values from other tables, or views, or both. See history of this SQl statement to 10.

INSERT unexpensive (to access plan version 17) but from this time physical reads very increased for this statement. This INSERT statement is used by this function module MENU_GENERATE_SAP_MENU.