sap programming syntax for select options in abap

abap programming use the word select options in its keyword usage to get the required output as shown below.

Effect

Declares a variable selection option.

This statement only makes sense in reports, i.e. in programs defined as type 1 in the attributes. You can execute reports with the SUBMIT statement. The statements SELECTOPTIONS and PARAMETERS determine the technical interface and the user interface. The parameters and selection options you specify are displayed on the selection screen for the user to enter values (see also the addition NO-DISPLAY or SUBMIT without the addition VIA SELECTION-SCREEN .

sel must be 1 - 8 characters long.

· This statement defines an internal table sel with a fixed structure which consists of the fields sel-SIGN , sel-OPTION , sel-LOW and sel-HIGH .
· A report can (by means of an entry in the attributes) be assigned to a logical database ldb . This means that both the logical database ldb and the report can define selection options (and parameters). You define the (database-specific) selection options in an ABAP/4 include program DBldbSEL (in logical database maintenance). The system then imports this include program into the actual logical database access program SAPDBldb and (partially) into the report. As a result, the database-specific selection options (and parameters) relevant to the report are available both to the database program SAPDBldb and to the report.

The 'report-specific' selection options are known only in the report (not in SAPDBldb ). Some SELECT-OPTIONS additions are allowed only in DBldbSEL . The addition 'NO DATABASE SELECTION' can only be used in the report.

· Each line of the internal table sel formulates a condition. If you require precise details about how to formulate these conditions, see the section on the IN operator under Logical expressions .
· If the user enters a value set on the selection screen, the internal table sel is automatically filled.

You can use normal ABAP/4 statements to read and manipulate the internal table sel .

· The values you enter for the database-specific selection options are passed directly to the database for data selection (i.e. no unwanted records are read). This also applies to report-specific SELECT-OPTIONS that refer to a field in a logical database table defined for dynamic selections (see also the addition " NO DATABASE SELECTION ").

You must check report-specific selections that refer to other fields with the CHECK statement (i.e. unwanted records must first be read from the database and discarded afterwards). This process is therefore not as efficient as the process described above.

· Under "Text elements/selection texts", you should enter a description for each selection criterion sel . This description is displayed on the selection screen. If no such text exists, the name sel of the selection option is displayed instead.

· The LOW and HIGH fields of a selection option are displayed in a length up to 18 bytes long (scrollable up to 45 bytes). If you define a length longer than 45, fields are truncated on the selection screen after the 45th character. This affects the first line of the SELECT-OPTIONS table. You can, however, pass longer selection options to a report if they are specified with the addition NO-DISPLAY and thus do not appear on the selection screen. Without NO-DISPLAY , the fields are then truncated whenever the selection screen is processed in the background (SUBMIT without VIA SELECTION-SCREEN ).

Example

SELECT-OPTIONS PROGRAM FOR SY-REPID.

&ABAP-EFFECT& Suppose you create an internal table

PROGRAM with the header line fields PROGRAM-SIGN ,

PROGRAM-OPTION , PROGRAM-LOW and PROGRAM-HIGH .

PROGRAM-LOW and PROGRAM-HIGH have the same field attributes as SY-REPID . When the report is executed, a line on the selection screen contains the text 'PROGRAM' or the associated selection text as well as input fields for PROGRAMLOW and PROGRAM-HIGH . At the end of the line, there is a pushbutton with an arrow. When you press this button, you branch to the 'Complex Selections' screen where you can enter more selection lines for sel . Here, you can formulate very complicated selection conditions. For further information about how these entries determine the result set, see Logical expressions or select Utilities -> Help sel. screen on the 'Complex Selections' screen.

· Field attributes on the selection screen. The input/output fields displayed on the selection screen for entry of upper and lower limits have the same attributes for type, length or conversion exits as the field f specified after FOR .

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abap programming syntax for Select

Abap programming has some keywords and select is one of the important one among them.Here is the syntax check for that.

Basic form

ELECT result [target] FROM source [where] [GROUP BY fields] [ORDER BY order].

Effect

Retrieves an extract and/or a set of data from a database table or view (see Relational database ). SELECT belongs to the OPEN SQL command set.

Each SELECT command consists of a series of clauses specifying different tasks:

The SELECT result clause specifies

· whether the result of the selection is a table or a single record,
· which columns the result is meant to have and
· whether the result is allowed to include identical lines.

The INTO target clause specifies the target area into which the selected data is to be read. If the target area is an internal table, the INTO clause specifies
· whether the selected data is to overwrite the contents of the internal table or
· whether the selected data is to be appended to the contents and
· whether the selected data is to be placed in the internal table all at once or in several packets.
The INTO clause can also follow the FROM clause.

You can omit the INTO clause. The system then makes the data available in the table work area (see TABLES ) dbtab . If the SELECT clause includes a "*", the command is processed like the identical SELECT * INTO dbtab FROM dbtab statement. If the SELECT clause contains a list a1 ... an , the command is executed like SELECT a1 ... an INTO CORRESPONDING FIELDS OF dbtab FROM dbtab .

If the result of the selection is meant to be a table, the data is usually (for further information, see INTO -Klausel ) read line by line within a processing loop introduced by SELECT and concluded by ENDSELECT . For each line read, the processing passes through the loop once. If the result of the selection is meant to be a single record, the closing ENDSELECT is omitted.

The FROM source clause the source (database table or view ) from which the data is to be selected. It also determines

· the type of client handling,
· the behavior for buffered tables and
· the maximum number of lines to be read.

The WHERE where clause specifies the conditions which the result of the selection must satisfy. It thus determines the lines of the result table. Normally - i.e. unless a client field is specified in the WHERE clause - only data of the current client is selected. If you want to select across other clients, the FROM clause must include the addition ... CLIENT SPECIFIED
. The GROUP-BY fields clause combines groups of lines together into single lines. A group is a set of lines which contain the same value for every database field in the GROUP BY clause.
The ORDER-BY order clause stipulates how the lines of the result table are to be ordered. Each time the SELECT statement is executed, the system field SY-DBCNT contains the number of lines read so far. After ENDSELECT , SY-DBCNT contains the total number of lines read.

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