Database Functions

DCOUNT function counting rows;with numeric values mw added "counting rows;" DCOUNT DCOUNT counts the number of rows (records) in a database that match the specified search criteria and contain numerical values.

Syntax DCOUNT(Database; DatabaseField; SearchCriteria) For the DatabaseField parameter you can enter a cell to specify the column, or enter the number 0 for the entire database. The parameter cannot be empty. Example In the example above (scroll up, please), we want to know how many children have to travel more than 600 meters to school. The result is to be stored in cell B16. Set the cursor in cell B16. Enter the formula =DCOUNT(A1:E10;0;A13:E14) in B16. The Function Wizard helps you to input ranges. Database is the range of data to be evaluated, including its headers: in this case A1:E10. DatabaseField specifies the column for the search criteria: in this case, the whole database. SearchCriteria is the range where you can enter the search parameters: in this case, A13:E14. To learn how many children in second grade are over 7 years of age, delete the entry >600 in cell D14 and enter 2 in cell B14 under Grade, and enter >7 in cell C14 to the right. The result is 2. Two children are in second grade and over 7 years of age. As both criteria are in the same row, they are connected by AND.

DCOUNTA function records;counting in Calc databases counting rows;with numeric or alphanumeric values mw added "records;" and "counting rows;" DCOUNTA DCOUNTA counts the number of rows (records) in a database that match the specified search conditions, and contain numeric or alphanumeric values.

Syntax DCOUNTA(Database; DatabaseField; SearchCriteria)

Example In the example above (scroll up, please), you can search for the number of children whose name starts with an E or a subsequent letter. Edit the formula in B16 to read =DCOUNTA(A1:E10;"Name";A13:E14). Delete the old search criteria and enter >=E under Name in field A14. The result is 5. If you now delete all number values for Greta in row 8, the result changes to 4. Row 8 is no longer included in the count because it does not contain any values. The name Greta is text, not a value. Note that the DatabaseField parameter must point to a column that can contain values.see i25407

DGET function cell contents;searching in Calc databases searching;cell contents in Calc databases mw added "cell contents;" and "searching;" DGET DGET returns the contents of the referenced cell in a database which matches the specified search criteria. In case of an error, the function returns either #VALUE! for no row found, or Err502 for more than one cell found.

Syntax DGET(Database; DatabaseField; SearchCriteria)

Example In the above example (scroll up, please), we want to determine what grade a child is in, whose name was entered in cell A14. The formula is entered in cell B16 and differs slightly from the earlier examples because only one column (one database field) can be entered for DatabaseField. Enter the following formula: =DGET(A1:E10;"Grade";A13:E14) Enter the name Frank in A14, and you see the result 2. Frank is in second grade. Enter "Age" instead of "Grade" and you will get Frank's age. Or enter the value 11 in cell C14 only, and delete the other entries in this row. Edit the formula in B16 as follows: =DGET(A1:E10;"Name";A13:E14) Instead of the grade, the name is queried. The answer appears at once: Daniel is the only child aged 11.

DMAX function maximum values in Calc databases searching;maximum values in columns mw added "maximum..." and "searching;" DMAX DMAX returns the maximum content of a cell (field) in a database (all records) that matches the specified search conditions.

Syntax DMAX(Database; DatabaseField; SearchCriteria)

Example To find out how much the heaviest child in each grade weighed in the above example (scroll up, please), enter the following formula in B16: =DMAX(A1:E10;"Weight";A13:E14) Under Grade, enter 1, 2, 3, and so on, one after the other. After entering a grade number, the weight of the heaviest child in that grade appears.

DMIN function minimum values in Calc databases searching;minimum values in columns mw added "minimum..." and "searching;" DMIN DMIN returns the minimum content of a cell (field) in a database that matches the specified search criteria.

Syntax DMIN(Database; DatabaseField; SearchCriteria)

Example To find the shortest distance to school for the children in each grade in the above example (scroll up, please), enter the following formula in B16: =DMIN(A1:E10;"Distance to School";A13:E14) In row 14, under Grade, enter 1, 2, 3, and so on, one after the other. The shortest distance to school for each grade appears.

DAVERAGE function averages; in Calc databases calculating;averages in Calc databases mw added "averages;..." and "calculating;" DAVERAGE DAVERAGE returns the average of the values of all cells (fields) in all rows (database records) that match the specified search criteria.

Syntax DAVERAGE(Database; DatabaseField; SearchCriteria)

Example To find the average weight of all children of the same age in the above example (scroll up, please), enter the following formula in B16: =DAVERAGE(A1:E10;"Weight";A13:E14) In row 14, under Age, enter 7, 8, 9, and so on, one after the other. The average weight of all children of the same age appears.

DPRODUCT function multiplying;cell contents in Calc databases mw added "multiplying..." DPRODUCT DPRODUCT multiplies all cells of a data range where the cell contents match the search criteria.

Syntax DPRODUCT(Database; DatabaseField; SearchCriteria)

Example With the birthday party example above (scroll up, please), there is no meaningful application of this function.

DSTDEV function standard deviations in databases;based on a sample mw added "standard deviations...;" DSTDEV DSTDEV calculates the standard deviation of a population based on a sample, using the numbers in a database column that match the given conditions. The records are treated as a sample of data. That means that the children in the example represent a cross section of all children. Note that a representative result can not be obtained from a sample of less than one thousand.

Syntax DSTDEV(Database; DatabaseField; SearchCriteria)

Example To find the standard deviation of the weight for all children of the same age in the example (scroll up, please), enter the following formula in B16: =DSTDEV(A1:E10;"Weight";A13:E14) In row 14, under Age, enter 7, 8, 9, and so on, one after the other. The result shown is the standard deviation of the weight of all children of this age.

DSTDEVP function standard deviations in databases;based on populations mw added "standard deviations...;" DSTDEVP DSTDEVP calculates the standard deviation of a population based on all cells of a data range which match the search criteria. The records from the example are treated as the whole population.

Syntax DSTDEVP(Database; DatabaseField; SearchCriteria)

Example To find the standard deviation of the weight for all children of the same age at Joe's birthday party (scroll up, please), enter the following formula in B16: =DSTDEVP(A1:E10;"Weight";A13:E14) In row 14, under Age, enter 7, 8, 9, and so on, one after the other. The result is the standard deviation of the weight for all same-aged children whose weight was checked.

DSUM function calculating;sums in Calc databases sums;cells in Calc databases mw added "calculating;" and "sums;" DSUM DSUM returns the total of all cells in a database field in all rows (records) that match the specified search criteria.

Syntax DSUM(Database; DatabaseField; SearchCriteria)

Example To find the length of the combined distance to school of all children at Joe's birthday party (scroll up, please) who are in second grade, enter the following formula in B16: =DSUM(A1:E10;"Distance to School";A13:E14) Enter 2 in row 14 under Grade. The sum (1950) of the distances to school of all the children who are in second grade is displayed.

DVAR function variances;based on samples mw added "variances;" DVAR DVAR returns the variance of all cells of a database field in all records that match the specified search criteria. The records from the example are treated as a sample of data. A representative result cannot be obtained from a sample population of less than one thousand.

Syntax DVAR(Database; DatabaseField; SearchCriteria)

Example To find the variance of the weight of all children of the same age of the above example (scroll up, please), enter the following formula in B16: =DVAR(A1:E10;"Weight";A13:E14) In row 14, under Age, enter 7, 8, 9, and so on, one after the other. You will see as a result the variance of the weight values for all children of this age.

DVARP function variances;based on populations mw added "variances;" DVARP DVARP calculates the variance of all cell values in a database field in all records that match the specified search criteria. The records are from the example are treated as an entire population.

Syntax DVARP(Database; DatabaseField; SearchCriteria)

Example To find the variance of the weight for all children of the same age at Joe's birthday party (scroll up, please), enter the following formula in B16: =DVARP(A1:E10;"Weight";A13:E14) In row 14, under Age, enter 7, 8, 9, and so on, one after the other. The variance of the weight values for all children of this age attending Joe's birthday party appears.