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What is the difference between update and append query?
Update queries modify information within a record at one or more fields at a time.Append queries copy complete records at a time, adding to the existing set of records in a table.For example, if an "Address" field needs to be changed for the records in a table, you can use an update query to make that change. If you have two tables with various "Customer Information" listings, you can use an append query to copy the records of one table to the other.
What are 2 ways to add a record to a table in Access?
You can enter it through the datasheet. You can enter it through a form. You can also use an Append Query to add records to a table from another table.
What is the difference between query datasheet and a table datasheet?
A query datasheet displays the results of a query operation, showing data based on specified criteria or calculations. A table datasheet displays the data in a table format, representing information stored in a database table. In essence, a query datasheet is derived from a table datasheet and is dynamic based on the query criteria.
What is a simple query?
A simple query would do something like just list of data in the table, without any other elements such as conditions or sub-queries or being a parameter query or using functions or formulas. So if all you wanted to do was list of all the names of people in a table, that would be a simple query.
If you delete query does it delete the original information in the table?
Your question is unclear. If you mean if you delete a query, then it does not affect the data in the table. Deleting any kind of query does not affect the data in any table it uses. If you mean if you run a Delete query, then yes the data in the table will be deleted. That is what Delete queries are for.
Explain the concept of database record and recordset?
A database record is a single row in a database. A recordset (or cursor) represents a query, and looks like (part of) a record or row. It is actually a row of the query, or virtual table representing the query. When you submit a query that returns data, you create a recordset and the database fills it in with the first record that matches the predicate clause. You do what you need to do with that data. When you need the next record, you fetch the next row, and so on and so forth. Some recordsets represent more than one row at a time. That is up to the database and your program design, but the concept is the same - the recordset is all or part of the resultset from the query.
Where does the destination table in an Append query show in the query grid?
It does not show in the query grid. On the Append To line you can pick the fields in the destination table that you want values to be appended to. The query grid is just for specifying what fields and records you want to be added to the destination table, so it only needs to show the source table.
What is query Optimization?
Queries of a database can be fast or slow. Depends on a lot of things. The size of the table, the amount of data you are requesting from the query, etc. One of the ways a dba can help query optimization, is by "updating statistics" on a table. Statistics of a table allows the query to find the most efficient way to gather the data from the table.
What are the parts of a basic SQL query?
The basic parts of a SQL Select query are: SELECT column names FROM table name WHERE conditions ORDER BY column names The basic parts of an insert query would be: INSERT INTO table name (VALUES) The basic parts of a delete query would be DELETE FROM table name WHERE conditions The basic parts of an update query would be UPDATE TABLE table name SET column name = value WHERE conditions
What is the smallest chunk of information in a table?
query
What is a record set object?
A record set object is a data structure that contains a group of records or rows retrieved from a database table or query result. It typically allows for iterating through the records, accessing field values, and performing operations on the data. Record set objects are commonly used in database programming to interact with and manipulate database query results.
What kind of query can change the contents of a table A selection query cannot?
There are several types that can do it. A Delete Query, an Update Query and an Append Query can. You can also create and delete entire tables with queries.
