基本解釋n. 自動跟蹤;自動描圖;電氣液壓靠模仿型銑床同根派生 autotrace相關(guān)詞英漢例句Why does AUTOTRACE not show partition pruning in the explain plan ? 為什么AUTOTRACE不會在執(zhí)行計劃中顯示分區(qū)截斷(partition pruning)?Autotrace's output is not showing partition elimination. AUTOTRACE的輸出沒有顯示分區(qū)截斷。Why is it that when I use AUTOTRACE in SQL*Plus, the explain plan never shows partition pruning taking place? 為什么當(dāng)我在SQL*Plus中使用AUTOTRACE時,執(zhí)行計劃從不顯示發(fā)生了分區(qū)截斷呢?SQL>set autotrace on;select * from t1 where object_type=:b0;SP2-0552: Bind variable "b0" not declared. 不輸入綁定變量的數(shù)值我如何看這條語句的執(zhí)行計劃呢?This is identical to what we saw above with autotrace, except we get to see that partition pruning did actually take place. 除了真實的看到分區(qū)截斷的確發(fā)生了,這與我們在上面用AUTOTRACE的結(jié)果一致。autotrace更多例句詞組短語短語set autotrace 選項SET AUTOTRACE ON 開啟set autotrace traceonly 查看執(zhí)行計劃;與ON相似set autotrace traceonly explain 只顯示執(zhí)行計set t autotrace 使用步驟autotrace更多詞組