1. ASCII 返回与指定的字符对应的十进制数; SQL> select ascii(A) A,ascii(a) a,ascii(0) zero,ascii( ) space from dual; A A ZERO SPACE --------- --------- --------- --------- 65 97 48 32 2. CHR 给出整数,返回对应的字符; SQL> select chr(54740) zhao,chr(65) chr65 from dual; ZH C --…
. ASCII 返回与指定的字符对应的十进制数; SQL) zero,ascii( ) space from dual; A A ZERO SPACE --------- --------- --------- --------- . CHR 给出整数,返回对应的字符; SQL) zhao,chr() chr65 from dual; ZH C -- - 赵 A . CONCAT 连接两个字符串; SQL)||转23 高乾竞电话 from dual; 高乾竞电话 ----------------…
1.ASCII 返回与指定的字符对应的十进制数; SQL> select ascii(A) A,ascii(a) a,ascii(0) zero,ascii( ) space from dual; A A ZERO SPACE --------- --------- --------- --------- 65 97 48 32 2. CHR 给出整数,返回对应的字符; SQL> select chr(54740) zhao,chr(65) chr65 from dual;…