oracle trunc()鍑芥暟鐨勭敤娉?br />
1.TRUNC(for dates)
TRUNC鍑芥暟涓烘寚瀹氬厓绱犺屾埅鍘葷殑鏃ユ湡鍊箋?br />鍏跺叿浣撶殑璇硶鏍煎紡濡備笅錛?br />TRUNC錛坉ate[,fmt]錛?br />鍏朵腑錛?br />date 涓涓棩鏈熷?br />fmt 鏃ユ湡鏍煎紡錛岃鏃ユ湡灝嗙敱鎸囧畾鐨勫厓绱犳牸寮忔墍鎴幓銆傚拷鐣ュ畠鍒欑敱鏈榪戠殑鏃ユ湡鎴幓
2.TRUNC(for number)
TRUNC鍑芥暟榪斿洖澶勭悊鍚庣殑鏁板鹼紝鍏跺伐浣滄満鍒朵笌ROUND鍑芥暟鏋佷負(fù)綾諱技錛屽彧鏄鍑芥暟涓嶅鎸囧畾灝忔暟鍓嶆垨鍚庣殑閮ㄥ垎鍋氱浉搴旇垗鍏ラ夋嫨澶勭悊錛岃岀粺緇熸埅鍘匯?br />鍏跺叿浣撶殑璇硶鏍煎紡濡備笅
TRUNC錛坣umber[,decimals]錛?br />鍏朵腑錛?br />number 寰呭仛鎴彇澶勭悊鐨勬暟鍊?br />decimals 鎸囨槑闇淇濈暀灝忔暟鐐瑰悗闈㈢殑浣嶆暟銆傚彲閫夐」錛屽拷鐣ュ畠鍒欐埅鍘繪墍鏈夌殑灝忔暟閮ㄥ垎
涓嬮潰鏄鍑芥暟鐨勪嬌鐢ㄦ儏鍐碉細(xì)
TRUNC錛?9.985錛?錛?89.98
TRUNC錛?9.985錛?89
TRUNC錛?9.985錛?1錛?80
娉ㄦ剰錛氱浜屼釜鍙傛暟鍙互涓鴻礋鏁幫紝琛ㄧず涓哄皬鏁扮偣宸﹁竟鎸囧畾浣嶆暟鍚庨潰鐨勯儴鍒嗘埅鍘伙紝鍗沖潎浠?璁般?/p>
{
format涓篸ay鏃?鍙簿紜埌澶?鑰屼笉綆″嚑騫村嚑鏈堝彧瑕佹槸絎﹀悎鐨刣ay灝卞彲浠ヤ簡,瑕佹兂紜畾涓騫翠腑鐨勬煇鏈堢殑鏌愪竴澶╁氨瑕佺敤trunc(date,''dd'').
閫氫織鐨勮鍚?format涓哄勾鏃?綺劇‘鍒?----騫?/p>
涓烘湀鏃?綺劇‘鍒?-----騫?鏈?涓嶇鍝勾,鍙鏄浉鍚岀殑鏈堝拰鍝ぉ)
涓烘棩鏃?綺劇‘鍒?-----騫?鏈?鏃?涓嶇鍝勾鐨勫摢鏈?鍙叧蹇冩槸鍝ぉ)
}
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鍜屽叾浠栨暟鎹簱緋葷粺綾諱技錛?a style="color: #004276; text-decoration: underline; ">Oracle瀛楃涓茶繛鎺ヤ嬌鐢?#8220;||”榪涜瀛楃涓叉嫾鎺ワ紝鍏朵嬌鐢ㄦ柟寮忓拰MSSQLServer涓殑鍔犲彿“+”涓鏍楓?/p>
姣斿鎵ц涓嬮潰鐨凷QL璇彞錛?br />
SELECT '宸ュ彿涓?||FNumber||'鐨勫憳宸ュ鍚嶄負(fù)'||FName FROM T_Employee
WHERE FName IS NOT NULL
闄や簡“||”錛孫racle榪樻敮鎸佷嬌鐢–ONCAT()鍑芥暟榪涜瀛楃涓叉嫾鎺ワ紝姣斿鎵ц涓嬮潰鐨凷QL璇彞錛?br style="clear: both; width: 0px; height: 0px; " />SELECT CONCAT('宸ュ彿:',FNumber) FROM T_Employee
濡傛灉CONCAT涓繛鎺ョ殑鍊間笉鏄瓧絎︿覆錛孫racle浼?xì)灏濊瘯灏嗗叾铦{鎹負(fù)瀛楃涓詫紝姣斿鎵ц涓嬮潰鐨凷QL璇彞錛?br />
SELECT CONCAT('騫撮緞:',FAge) FROM T_Employee
涓嶮YSQL鐨凜ONCAT()鍑芥暟涓嶅悓錛孫racle鐨凜ONCAT()鍑芥暟鍙敮鎸佷袱涓弬鏁幫紝涓嶆敮鎸佷袱涓互涓婂瓧絎︿覆鐨勬嫾鎺ワ紝姣斿涓嬮潰鐨凷QL璇彞鍦∣racle涓槸閿欒鐨勶細(xì)
SELECT CONCAT('宸ュ彿涓?,FNumber,'鐨勫憳宸ュ鍚嶄負(fù)',FName) FROM T_Employee
WHERE FName IS NOT NULL
榪愯浠ュ悗Oracle浼?xì)鎶ュ囖Z笅闈㈢殑閿欒淇℃伅錛?br style="clear: both; width: 0px; height: 0px; " />鍙傛暟涓暟鏃犳晥
濡傛灉瑕佽繘琛屽涓瓧絎︿覆鐨勬嫾鎺ョ殑璇濓紝鍙互浣跨敤澶氫釜CONCAT()鍑芥暟宓屽浣跨敤錛屼笂闈㈢殑SQL鍙互濡備笅鏀瑰啓錛?br style="clear: both; width: 0px; height: 0px; " />SELECT CONCAT(CONCAT(CONCAT('宸ュ彿涓?,FNumber),'鐨勫憳宸ュ鍚嶄負(fù)'),FName) FROM
T_Employee
WHERE FName IS NOT NULL
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