Your SlideShare is downloading. ×
MELJUN CORTES Query (SQL)
MELJUN CORTES Query (SQL)
MELJUN CORTES Query (SQL)
MELJUN CORTES Query (SQL)
MELJUN CORTES Query (SQL)
MELJUN CORTES Query (SQL)
MELJUN CORTES Query (SQL)
MELJUN CORTES Query (SQL)
MELJUN CORTES Query (SQL)
MELJUN CORTES Query (SQL)
MELJUN CORTES Query (SQL)
MELJUN CORTES Query (SQL)
Upcoming SlideShare
Loading in...5
×

Thanks for flagging this SlideShare!

Oops! An error has occurred.

×
Saving this for later? Get the SlideShare app to save on your phone or tablet. Read anywhere, anytime – even offline.
Text the download link to your phone
Standard text messaging rates apply

MELJUN CORTES Query (SQL)

257

Published on

MELJUN CORTES Query (SQL)

MELJUN CORTES Query (SQL)

Published in: Technology
0 Comments
0 Likes
Statistics
Notes
  • Be the first to comment

  • Be the first to like this

No Downloads
Views
Total Views
257
On Slideshare
0
From Embeds
0
Number of Embeds
0
Actions
Shares
0
Downloads
3
Comments
0
Likes
0
Embeds 0
No embeds

Report content
Flagged as inappropriate Flag as inappropriate
Flag as inappropriate

Select your reason for flagging this presentation as inappropriate.

Cancel
No notes for slide

Transcript

  • 1. Querying the DatabaseMELJUN CORTES
  • 2. QUERY A question represented in a way the OO.Org Base can understand Are used to find more item one record, let you specify the field you want to see in the Data sheet To access only a subset of your data that can be well defined by a filter condition
  • 3. Dynaset Is the set of records resulting from a query or filter When you edit records in a dynaset, you are actually editing the records in the original table
  • 4. Creating Query usingDesign View Open the database file where you want to create the new query Select Queries object/icon from Database Pane Click Create Query in Design View Run the query (use Run button)
  • 5. Querying with TextExact text dataExamples:  Pop (or Pop)  Pasig (or Pasig) Using Wildcards  Symbols that represent any character or combination or characters
  • 6. Wildcards(or wildcard characters) Asterisk (*) – represents any collection of charactersExample: R*TResult : RT, RAT, RENT, RESET Question Mark (?) – represents any individual characterExample: R?TResult : RAT, ROT, RIT, RUT
  • 7. Querying with Numbers Exact numerical value Default, assumed to be equal to value indicatedOPERATOR – is a sign or symbol that specifies the type of calculation to perform within an expression Other comparison operators > greater than < less than >= greater than or equal <= less than or equal NOT not equal to BETWEEN ___ AND ____
  • 8. Criterion Are used to select records in queries and filters Is a set of conditions that must be matched in order for a record to be included in a dynaset
  • 9. Compound Criteria AND Conditional QueryPlace criteria on the same line(Use CRITERIA row of the design grid) OR Conditional QueryPlace criteria on separate lines(Use CRITERIA and OR rows of the design grid)
  • 10. Expression Are used to specify criteria in queries perform updates in an action query Is any combination of mathematical or logical operators, constants, functions, names of fields and properties that evaluates to a single value
  • 11. JOINING TABLES Select the tables to bring out the field lists at the upper pane of the Select Query window Access will draw a line, called join line, between matching fields in the two tables Select fields either the tables, enter criteria, run query Access will join the tables automatically
  • 12. Sorting Data in a Query Sort key – field or fields on which the records are sorted Primary sort key (or major key) – more important key when sorting on more than one field Secondary sort key (or minor key) Specify sort order in the SORT line of the design grid, e.g., sort key on the left will be the major sort key)

×