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严信娜世役

镳邃桕囹

: : = 牋牋牋� 篑腩忤�

|篑腩忤� AND 镳邃桕囹

|篑腩忤� OR 镳邃桕囹

|NOT 镳邃桕囹

篑腩忤�

牋牋牋 : : = 牋牋牋� 篑腩忤� � 耩噔礤龛�

| 篑腩忤� � between

|篑腩忤� � like

|篑腩忤� � in

|篑腩忤� � exists

篑腩忤� � 耩噔礤龛� �

: : = 牋牋牋� 耜嚯�痦铄 � 恹疣驽龛� 铒屦囹铕 � 耩噔礤龛� 耜嚯�痦铄 � 恹疣驽龛�

|耜嚯�痦铄 � 恹疣驽龛� 铒屦囹铕 � 耩噔礤龛��

(恹疣驽龛� � 皴脲牿梃 � 潆� � 耱铍狯�)

[耜嚯�痦铄椻噫屙桢 IS [NOT] NULL

铒屦囹铕 � 耩噔礤龛�

牋牋牋 : : =+| �=| < |� � < | <= | > | � > | > =

恹疣驽龛� � 皴脲牿梃 � 潆� � 耱铍狯�

: : =牋 牋牋� 麴噻� � 皴脲牿梃 � 潆� � 耱铍狯�

麴噻� � from

[ 麴噻� � where]

[麴噻� � 沭箫镨痤忄龛� [麴噻� � having]]

麴噻� � 皴脲牿梃 � 潆� � 耱铍狯�

: : =� 牋牋牋 SELECT [DISTINCT] 耜嚯�痦铄 � 恹疣驽龛�

篑腩忤� � between

: : =� 牋牋牋 桁� � 耱铍狯� [NOT] BETWEEN 耜嚯�痦铄 � 恹疣驽龛�

AND牋 牋� 耜嚯�痦铄 � 恹疣驽龛� 篑腩忤� � like

: : = 牋牋牋� 桁� � 耱铍狯�

[NOT] LIKE 耜嚯�痦铄 � 恹疣驽龛�

篑腩忤� � in

: : = 牋牋牋� 耜嚯�痦铄 恹疣驽龛� [NOT] IN (祉铈羼蜮� � 耜嚯�痤�)

祉铈羼蜮� � 耜嚯�痤�

: : =� 牋牋牋 耧桉铌 � 觐眈蜞眚�

| 恹疣驽龛� � 皴脲牿梃 � 潆� � 耱铍狯�

篑腩忤� � exists

: :=牋 EXISTS (恹疣驽龛鍡皴脲牿梃)

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