What are the pre requisites ?

What are the pre requisites ?
by

1 Answer

Answer :

I. to modify data type of a column ? ii. to add a column with NOT NULL
constraint ? To Modify the datatype of a column the column must be
empty. to add a column with NOT NULL constrain, the table must be
empty.
by

Related questions

“Efficient means of transport are pre-requisites for the fast development.” Express your views in favour of this statement. -Geography

Description : “Efficient means of transport are pre-requisites for the fast development.” Express your views in favour of this statement. -Geography

Last Answer : Importance of efficient means of transport for the development is to be explained as: (i) People need transportation to supply goods and services from one place to another. (ii) Movement of goods ... a country depends upon the production of goods and services as well as their movement over space.

“Efficient means of transport are pre-requisites for the fast development.” -SST 10th

Description : “Efficient means of transport are pre-requisites for the fast development.” -SST 10th

Last Answer : Technology stimulated the globalization process: . Improved transportation technology has made much faster delivery of goods across long distance at lower cost. . Goods are placed in the containers ... . rapidly. . . Telecommunication facilities are used to contact one another around the world.

Efficient means of transport are pre-requisites for the fast development.' Express your views in favour of this statement. -SST 10th

Description : Efficient means of transport are pre-requisites for the fast development.' Express your views in favour of this statement. -SST 10th

Last Answer : 1. Various kinds of goods and services are needed for the healthy development and well being of human beings. However, all of these goods and services are not readily available in our ... world, where the world is highly interconnected, an efficient means of transport is an essential aspect.

“Efficient means of transport are pre-requisites for fast development”. Support the statement with suitable examples. -SST 10th

Description : “Efficient means of transport are pre-requisites for fast development”. Support the statement with suitable examples. -SST 10th

Last Answer : The pace of development of a country depends upon the production of goods and services as well as their movement overspace. Therefore, efficient means of transport are pre-requisites for fast economic and social development.

For ensuring the adequacy of entry behaviour, stress is given to (a) Teacher resources (b) Community resources (c) Pre-requisites (d) Parental requisites

Description : For ensuring the adequacy of entry behaviour, stress is given to (a) Teacher resources (b) Community resources (c) Pre-requisites (d) Parental requisites

Last Answer : (c) Pre-requisites

The important pre-requisites of a researcher in sciences, social sciences and humanities are (A) laboratory skills, records, supervisor, topic (B) Supervisor, topic, critical analysis, patience (C) archives, supervisor, topic, flexibility in thinking (D) topic, supervisor, good temperament, pre-conceived notions

Description : The important pre-requisites of a researcher in sciences, social sciences and humanities are (A) laboratory skills, records, supervisor, topic (B) Supervisor, topic, critical analysis, ... supervisor, topic, flexibility in thinking (D) topic, supervisor, good temperament, pre-conceived notions

Last Answer : (B) Supervisor, topic, critical analysis, patience

What is the Difference between a post query and a pre query

Description : What is the Difference between a post query and a pre query

Last Answer : A post query will fire for every row that is fetched but the pre query will fire only once.

Can we use GO-BLOCK package in a pre-field trigger ?

Description : Can we use GO-BLOCK package in a pre-field trigger ?

Last Answer : No

A query fetched 10 records How many times does a PRE- QUERY Trigger and POST-QUERY Trigger will get executed ?

Description : A query fetched 10 records How many times does a PRE-QUERY Trigger and POST-QUERY Trigger will get executed ?

Last Answer : PRE-QUERY fires once. POST-QUERY fires 10 times.

When is PRE-QUERY trigger executed ?

Description : When is PRE-QUERY trigger executed ?

Last Answer : When Execute-query or count-query Package procedures are invoked.

What is a difference between pre-select and pre-query?

Description : What is a difference between pre-select and pre-query?

Last Answer : Fires during the execute query and count query processing after oracle forms constructs the select statement to be issued, but before the statement is actually issued. The pre-query trigger fires ... the query criteria in enter query mode.Pre-query trigger fires before pre-select trigger.

What are the requisites for maintaining poultry? -Biology

Description : What are the requisites for maintaining poultry? -Biology

Last Answer : answer:

What are the requisites for maintaining poultry? -Biology

Description : What are the requisites for maintaining poultry? -Biology

Last Answer : answer:

What are the requisites to attend to a veterinary assistant school ?

Description : What are the requisites to attend to a veterinary assistant school ?

Last Answer : You must at least have a highschool diploma to attend veterinary school. If you have a GED you can enroll.

Requisites of a reversible process is that the (A) System and surroundings pressure be equal (B) Friction in the system should be absent (C) System and surroundings temperature be equal (D) None of these

Description : Requisites of a reversible process is that the (A) System and surroundings pressure be equal (B) Friction in the system should be absent (C) System and surroundings temperature be equal (D) None of these

Last Answer : B) Friction in the system should be absent

What does "jumps off the screen" mean?

Description : What does "jumps off the screen" mean?

Last Answer : answer:AMD is a relatively small manufacturer but well established in the industry. In this context, AMD jumps off the screen at the guy doing the research into acquiring companies for ... chip manufacturing division, but AMD is the one that really stands out from an acquisition perspective.

How to add conditions in select statement in oracle?

Description : How to add conditions in select statement in oracle?

Last Answer : Just add the decode

How can I dump an oracle schema to a LOCAL file over a network connection from sqlplus?

Description : How can I dump an oracle schema to a LOCAL file over a network connection from sqlplus?

Last Answer : By connecting and spooling are you excluding the exp/imp commands (or expdb/impdb in 10g)?

What are the two ways to incorporate images into a oracle forms application?

Description : What are the two ways to incorporate images into a oracle forms application?

Last Answer : Boilerplate Images Image_items

Can one export a subset of a table? (for DBA

Description : Can one export a subset of a table? (for DBA

Last Answer : From Oracle8i one can use the QUERY= export parameter to selectively unload a subset of the data from a table. Look at this example: exp scott/tiger tables=emp query=\"where deptno=10\"

What are the types of visual attribute settings?

Description : What are the types of visual attribute settings?

Last Answer : Custom Visual attributes Default visual attributes Named Visual attributes. Window

How does one use the import/export utilities? (for DBA

Description : How does one use the import/export utilities? (for DBA

Last Answer : Look for the "imp" and "exp" executables in your $ORACLE_HOME/bin directory. One can run them interactively, using command line parameters, or using parameter files. Look at the imp/exp parameters ... and export data with the "Schema Manager" GUI that ships with Oracle Enterprise Manager (OEM).

what is a display item?

Description : what is a display item?

Last Answer : Display items are similar to text items but store only fetched or assigned values. Operators cannot navigate to a display item or edit the value it contains.

What is import/export and why does one need it? (for DBA

Description : What is import/export and why does one need it? (for DBA

Last Answer : The Oracle export (EXP) and import (IMP) utilities are used to perform logical database backup and recovery. They are also used to move Oracle data from one machine, database or schema to ... corruption. Ensure that all the data can be read. . Transporting tablespaces between databases . Etc.

Are there any troubleshooting tips for OEM? (for DBA

Description : Are there any troubleshooting tips for OEM? (for DBA

Last Answer : . Create the OEM repository with a user (which will manage the OEM) and store it in a tablespace that does not share any data with other database users. It is a bad practice to create ... successfully. Check the log to see the results of the execution rather than relying on this status.

Where can one get more information about TCL? (for DBA

Description : Where can one get more information about TCL? (for DBA

Last Answer : One can write custom event checking routines for OEM using the TCL (Tool Command Language) language. Check the following sites for more information about TCL: . The Tcl Developer Xchange - ... the OraTCL package . Tom Poindexter's Tcl Page - Oratcl was originally written by Tom Poindexter

How does one start the Oracle Intelligent Agent? (for DBA

Description : How does one start the Oracle Intelligent Agent? (for DBA

Last Answer : One needs to start an OIA (Oracle Intelligent Agent) process on all machines that will to be managed via OEM. For OEM 9i and above:

What is the Oracle Intelligent Agent? (for DBA

Description : What is the Oracle Intelligent Agent? (for DBA

Last Answer : The Oracle Intelligent Agent (OIA) is an autonomous process that needs to run on a remote node in the network to make the node OEM manageable. The Oracle Intelligent Agent is ... events registered in Enterprise Manager; and . Executing tasks associated with jobs submitted to Enterprise Manager.

What are the types of SQL Statement ?

Description : What are the types of SQL Statement ?

Last Answer : Data Definition Language : CREATE,ALTER,DROP,TRUNCATE,REVOKE,NO AUDIT & COMMIT.

How does one backout events and jobs during maintenance slots? (for DBA

Description : How does one backout events and jobs during maintenance slots? (for DBA

Last Answer : Managemnet and data collection activity can be suspended by imposing a blackout. Look at these examples: agentctl start blackout # Blackout the entrire agent agentctl stop blackout # Resume normal monitoring ... management agentctl start blackout -s jobs -d 00:20 # Blackout jobs for 20 minutes

What kind of jobs can one schedule with OEM? (for DBA

Description : What kind of jobs can one schedule with OEM? (for DBA

Last Answer : OEM comes with pre-defined jobs like Export, Import, run OS commands, run sql scripts, SQL*Plus commands etc. It also gives you the flexibility of scheduling custom jobs written with the TCL language.

Difference between SUBSTR and INSTR ?

Description : Difference between SUBSTR and INSTR ?

Last Answer : INSTR (String1,String2(n,(m)),INSTR returns the position of the mth occurrence of the string 2 instring1. The search begins from nth position of string1.SUBSTR (String1 n,m)SUBSTR returns a character string of size m in string1, starting from nth position of string1.

Should the OEM Console be displayed at all times (when there are scheduled jobs)? (for DBA

Description : Should the OEM Console be displayed at all times (when there are scheduled jobs)? (for DBA

Last Answer : When a job is submitted the agent will confirm the status of the job. When the status shows up as scheduled, you can close down the OEM console. The processing of the job is managed by the OIA ... that OEM will not be able to send e-mail and paging notifications when the Console is not started.

Explain UNION,MINUS,UNION ALL, INTERSECT ?

Description : Explain UNION,MINUS,UNION ALL, INTERSECT ?

Last Answer : INTERSECT returns all distinct rows selected by both queries.MINUS - returns all distinct rows selected by the first query but not by the second.UNION - returns all distinct rows selected by either queryUNION ALL - returns all rows selected by either query, including all duplicates.

WHY USE RMAN ? (for DBA

Description : WHY USE RMAN ? (for DBA

Last Answer : No extra costs Its available free ?RMAN introduced in Oracle 8 it has become simpler with newer versions and easier than user managed backups ?Proper security ?You are 100% sure your ... what need to backed up Knows what is required for recovery Knows what backups are redundant

WHAT IS RMAN ? (for DBA

Description : WHAT IS RMAN ? (for DBA

Last Answer : Recovery Manager is a tool that: manages the process of creating backups and also manages the process of restoring and recovering from them.

What is the basic structure of PL/SQL ?

Description : What is the basic structure of PL/SQL ?

Last Answer : PL/SQL uses block structure as its basic structure. Anonymous blocks or nested blocks can be used in PL/SQL.

What are the two parts of a procedure ?

Description : What are the two parts of a procedure ?

Last Answer : Procedure Specification and Procedure Body.

What are the datatypes a available in PL/SQL ?

Description : What are the datatypes a available in PL/SQL ?

Last Answer : Some scalar data types such as NUMBER, VARCHAR2, DATE, CHAR, LONG, BOOLEAN. Some composite data types such as RECORD & TABLE.

What are the return values of functions SQLCODE and SQLERRM ? What is Pragma EXECPTION_INIT ? Explain the usage ?

Description : What are the return values of functions SQLCODE and SQLERRM ? What is Pragma EXECPTION_INIT ? Explain the usage ?

Last Answer : SQLCODE returns the latest code of the error that has occurred. SQLERRM returns the relevant error message of the SQLCODE.

What is Overloading of procedures ?

Description : What is Overloading of procedures ?

Last Answer : The Same procedure name is repeated with parameters of different datatypes and parameters in different positions, varying number of parameters is called overloading of procedures. e.g. DBMS_OUTPUT put_line

s it possible to set a filter condition in a cross product group in matrix reports?

Description : s it possible to set a filter condition in a cross product group in matrix reports?

Last Answer : No

Can a repeating frame be created without a data group as a base?

Description : Can a repeating frame be created without a data group as a base?

Last Answer : No

What is an OLE?

Description : What is an OLE?

Last Answer : Object Linking & Embedding provides you with the capability to integrate objects from many Ms-Windows applications into a single compound document creating integrated applications enables you to use the features form .

What are the different objects that you cannot copy or reference in object groups?

Description : What are the different objects that you cannot copy or reference in object groups?

Last Answer : Objects of different modules Another object groups Individual block dependent items Program units.

If the maximum record retrieved property of the query is set to 10 then a summary value will be calculated?

Description : If the maximum record retrieved property of the query is set to 10 then a summary value will be calculated?

Last Answer : Only for 10 records.

Are there any undocumented commands in Oracle? (for DBA

Description : Are there any undocumented commands in Oracle? (for DBA

Last Answer : Sure there are, but it is hard to find them. Look at these examples: From Server Manager (Oracle7.3 and above): ORADEBUG HELP It looks like one can change memory locations with the ORADEBUG POKE ... rdbms/lib/oradbx.o; make -f oracle.mk oradbx) SQL*Plus: ALTER SESSION SET CURRENT_SCHEMA = SYS;

How does one use ORADEBUG from Server Manager/ SQL*Plus? (for DBA

Description : How does one use ORADEBUG from Server Manager/ SQL*Plus? (for DBA

Last Answer : Execute the "ORADEBUG HELP" command from svrmgrl or sqlplus to obtain a list of valid ORADEBUG commands. Look at these examples: SQLPLUS> REM Trace SQL statements with bind variables SQLPLUS> oradebug ... oradebug lkdebug -a convres SQLPLUS> oradebug lkdebug -r (i.e 0x8066d338 from convres dump)

What is the OPTIMAL parameter?

Description : What is the OPTIMAL parameter?

Last Answer : How does one use ORADEBUG from Server Manager/ SQL*Plus? (for DBA

What is the use of TABLES option in EXP command ?

Description : What is the use of TABLES option in EXP command ?

Last Answer : List of tables should be exported.ze)