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				@@ -283,10 +283,10 @@ create table tb_whisper 
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				     comment '悄悄话'; 
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				 alter table tb_poster_lib 
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				-    add column name varchar(32) not null comment '海报名称' after id, 
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				-    add column start_time datetime comment '开始时间' after url, 
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				-    add column end_time   datetime comment '结束时间' after start_time; 
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				+    add column name       varchar(32) not null comment '海报名称' after id, 
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				+    add column start_time varchar(10) comment '开始时间' after url, 
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				+    add column end_time   varchar(10) comment '结束时间' after start_time; 
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				 alter table tb_whisper 
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				-    add column start_time datetime comment '开始时间' after content, 
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				-    add column end_time   datetime comment '结束时间' after start_time; 
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				+    add column start_time varchar(10) comment '开始时间' after content, 
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				+    add column end_time   varchar(10) comment '结束时间' after start_time; 
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