SAP fine tune and understanding basics of SAP

http://sapabap.iespana.es/sap/info/hr_overview.htm?0&weborama=17 <- prodvided by sarah
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http://help.sap.com/saphelp_40b/helpdata/EN/60/d8bc17576311d189270000e8322f96/content.htm




for those select statement like select single..probably u can tune d pgm to read like ie. SELECT SINGLE stext FROM hrp1000 INTO ws_stext
WHERE otype EQ 'S'
AND plvar EQ '01'
AND objid EQ p0001-plans
AND begda LE cdate
AND endda GE cdate.