oracle - pl/sql insert multiple rows using for loop variable seen as not declared -

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i've following anonymous block declared variable:

declare tst number(9) :=0; begin vcnt in 1..1000 loop tst := vcnt; insert samp_tab values(:tst,'a'); end loop; end;

i want insert table value of counter row in every cycle of loop, using variable counter value in insert value. when execute code, oracle returns:

 bind variable "tst" not declared  anonymous block completed.

how fix code?

if want refer local variable, don't prefix colon

declare   tst number(9) :=0; begin   vcnt in 1..1000   loop     tst := vcnt;     insert samp_tab values(tst,'a');   end loop; end;

this assumes samp_tab table 2 columns, first being numeric , second being string. practice, want list columns inserting explicitly-- makes code more self-documenting , means won't create errors later if adds new columns table later have default values.


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