INTERVAL '{ integer | integer time_expr | time_expr }' { { DAY | HOUR | MINUTE } [ ( leading_precision ) ] | SECOND [ ( leading_precision [, fractional_seconds_precision ] ) ] } [ TO { DAY | HOUR | MINUTE | SECOND [ (fractional_seconds_precision) ] } ] leading_precision值的...
INTERVAL '{ integer | integer time_expr | time_expr }' { { DAY | HOUR | MINUTE } [ ( leading_precision ) ] | SECOND [ ( leading_precision [, fractional_seconds_precision ] ) ] } [ TO { DAY | HOUR | MINUTE | SECOND [ (fractional_seconds_precision) ] } ] leading_precision值的...
INTERVAL '{ integer | integer time_expr | time_expr }' { { DAY | HOUR | MINUTE } [ ( leading_precision ) ] | SECOND [ ( leading_precision [, fractional_seconds_precision ] ) ] } [ TO { DAY | HOUR | MINUTE | SECOND [ (fractional_seconds_precision) ] } ] leading_precision值的...
INTERVAL DAY TO SECOND类型可以用来存储单位为天和秒的时间间隔。下面这条语句创建一个名为promotions的表,用来存储促销信息。promotions表包含了一个INTERVAL DAY TO SECOND类型的列duration,该列用来记录促销有效的时间间隔: CREATE TABLE promotions ( promotion_id INTEGER CONSTRAINT promotions_pk PRIMARY KEY, name...
INTERVAL DAY TO SECOND数据类型 Oracle语法: INTERVAL '{ integer | integer time_expr | time_expr }' { { DAY | HOUR | MINUTE } [ ( leading_precision ) ] | SECOND [ ( leading_precision [, fractional_seconds_precision ] ) ] }
INTERVALDAYTOSECOND数据类型Oracle语法:INTERVAL'{integer|integertime_expr|time_expr}'{{DAY|HOUR|MINUTE}[(leading_precision)]|SECOND[(leading_precision[,fractional_seconds_precision])]}[TO{DAY|HOUR|MINUTE|SECOND[(fractional_seconds_precision)]}]leading_precision值的范围是0到9,默认是2.time_expr的...
INTERVAL DAY TO SECOND类型可以用来存储单位为天和秒的时间间隔。下面这条语句创建一个名为promotions的表,用来存储促销信息。promotions表包含了一个INTERVAL DAY TO SECOND类型的列duration,该列用来记录促销有效的时间间隔: CREATE TABLE promotions ( promotion_id INTEGER CONSTRAINT promotions_pk PRIMARY KEY, ...
INTERVAL DAY TO SECOND类型可以⽤来存储单位为天和秒的时间间隔。下⾯这条语句创建⼀个名为promotions的表，⽤来存储促销信息。promotions表包含了⼀个INTERVAL DAY TO SECOND类型的列duration，该列⽤来记录促销有效的时间间隔：CREATE TABLE promotions (promotion_id INTEGER CONSTRAINT promotions_pk PRIMARY...
二、INTERVAL DAY TO SECOND数据类型 Oracle语法: INTERVAL '{ integer | integer time_expr | time_expr }' { { DAY | HOUR | MINUTE } [ ( leading_precision ) ] | SECOND [ ( leading_precision [, fractional_seconds_precision ] ) ] } [ TO { DAY | HOUR | MINUTE | SECOND [ (fractional...
INTERVAL DAY TO SECOND类型可以用来存储单位为天和秒的时间间隔。下面这条语句创建一个名为promotions的表,用来存储促销信息。promotions表包含了一个INTERVAL DAY TO SECOND类型的列duration,该列用来记录促销有效的时间间隔: CREATE TABLE promotions ( promotion_id INTEGER CONSTRAINT promotions_pk PRIMARY KEY, ...