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若第一个字符串不存在与第二个字符串，则返回0 TRIM([ BOTH | LEADING | TRAILING ] string1 FROM string2) STRING 去除string2字符串的首尾(或首部、或尾部)的string1字符串 LTRIM(string) STRING
', 'yyyy/MM/dd HH:mm'); _col0 --------------------------------------- 1960-01-22 03:04:00.000 Asia/Shanghai
window table-valued function, -- window table-valued function should be used with aggregate operation, -- this example is just used for explaining
org.apache.flink.table.api.ValidationException: SQL validation failed.
Yael Ben-Haim and Elad Tom-Tov, "A streaming parallel decision tree algorithm", J.
org.apache.flink.table.api.ValidationException: SQL validation failed.
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