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EXEC SQL connect to "db1@online7" as 'db1';EXEC SQL connect to "db2@online9" as 'db2';
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EXEC SQL set connection 'db1'; ]]>
1EXEC SQL SELECT MAX(index) INTO :index
2 FROM table
3 WHERE x=:x AND y=:y;
EXEC SQL SELECT MAX(index) INTO :index2
FROM table3
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緇撹鏄細鍦ㄤ嬌鐢⊿ELECT MAX涔嬪墠錛岄渶瑕侀鍏堢‘瀹氭弧瓚砏HERE鏉′歡鐨凜OUNT(*)>0錛屽惁鍒欎細閫犳垚鏈煡閿欒銆?br>
PS錛氳嚦浜庡垰鎵嶇綉鍧涓綔鑰呮墍璇寸殑絀鴻〃鏃朵細鎶?201閿欐垜娌℃湁紕板埌錛屾垜鍦ㄧ┖琛ㄦ椂鍜屾病鎵懼埌璁板綍鏃剁幇璞＄浉鍚屻?
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