SELECT option question....

Hi all,

What is the meaning of FOR ALL ENTRIES IN.. as in the code below: where can I find the documentation of FOR ALL?

Code:

SELECT * INTO CORRESPONDING FIELDS OF TABLE L_SPETAB

FROM VBAK

FOR ALL ENTRIES IN LVBUK

WHERE VBELN = LVBUK-VBELN

AND LIFSK IN LIFSPE

AND VKORG = VKORG

AND VTWEG IN VTWEG

AND SPART IN SPART.

What is the meaning of IN (as in the last line of code above)?

Thanks,

Charles.