Oracle中，能連接兩個(gè)或多個(gè)字符的運(yùn)算符是什么？這是一個(gè)連接符號(hào)。例如，如果您選擇AAA和bbbaaa | BBB，則它將是AAABBSELECT “AAA”| | | | | | | | | |

Oracle中，能連接兩個(gè)或多個(gè)字符的運(yùn)算符是什么？

這是一個(gè)連接符號(hào)。例如，如果您選擇AAA和bbbaaa | BBB，則它將是AAABBSELECT “AAA”| | | | | | | | | | | | | | | | | | | | | | | | | | | |。您還可以在字段中添加字符串關(guān)鍵字：Oracle connection operator double vertical bar“|”將兩個(gè)字段字符串連接在一起。連接運(yùn)算符是雙豎條“|”，通過(guò)連接操作將兩個(gè)字段字符串連接在一起。例如，SQL代碼select uname | age as “name and age”from uinfo result is:name and age black hair 25 purple hair 19還可以在結(jié)果集中添加字符串SQL代碼select uname | age as “name and age”from uinfo black hair age:25 purple hair age:19