讓我們首先來(lái)看一個(gè)創(chuàng)建表，添加記錄并顯示它們的示例。CREATE命令用于創(chuàng)建表。mysql>?CREATE?table?RowCountDemo

->?(

->?ID?int,

->?Name?varchar(100)

>?);

使用INSERT命令插入記錄。mysql>INSERT?into?RowCountDemo?values(1,'Larry');

mysql>INSERT?into?RowCountDemo?values(2,'John');

mysql>INSERT?into?RowCountDemo?values(3,'Bela');

mysql>INSERT?into?RowCountDemo?values(4,'Jack');

mysql>INSERT?into?RowCountDemo?values(5,'Eric');

mysql>INSERT?into?RowCountDemo?values(6,'Rami');

mysql>INSERT?into?RowCountDemo?values(7,'Sam');

mysql>INSERT?into?RowCountDemo?values(8,'Maike');

mysql>INSERT?into?RowCountDemo?values(9,'Rocio');

mysql>INSERT?into?RowCountDemo?values(10,'Gavin');

顯示記錄。mysql>SELECT?*from?RowCountDemo;

以下是上述查詢的輸出。+------+-------+

|?ID???|?Name??|

+------+-------+

|?1????|?Larry?|

|?2????|?John??|

|?3????|?Bela??|

|?4????|?Jack??|

|?5????|?Eric??|

|?6????|?Rami??|

|?7????|?Sam???|

|?8????|?Maike?|

|?9????|?Rocio?|

|?10???|?Gavin?|

+------+-------+

10?rows?in?set?(0.00?sec)

為了快速計(jì)算行數(shù)，我們有以下兩個(gè)選項(xiàng)-

查詢1mysql?>SELECT?count(*)?from?RowCountDemo;

以下是上述查詢的輸出。+----------+

|?count(*)?|

+----------+

|?10???????|

+----------+

1?row?in?set?(0.00?sec)

查詢2mysql>SELECT?count(found_rows())?from?RowCountDemo;

以下是上述查詢的輸出。+---------------------+

|?count(found_rows())?|

+---------------------+

|?10??????????????????|

+---------------------+

1?row?in?set?(0.00?sec)

總結(jié)

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