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“mysql語(yǔ)句大全_中藥大全“可能指的何結合是一個(gè)資源或數據庫，其中包含了大量的語(yǔ)句應用MySQL數據庫操作語(yǔ)句和中藥信息。這個(gè)資源旨在為需要學(xué)習SQL語(yǔ)言和了解中藥知識的大全大全用戶(hù)提供方便的參考和查詢(xún)服務(wù)。

1. 查詢(xún)操作(SELECT)

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簡(jiǎn)單??查詢(xún)SELECT * FROM table_name;

條件查詢(xún)SELECT column_name FROM table_name WHERE condition;

分組查詢(xún)SELECT column_name,進(jìn)行 sum(column_value) FROM tab??le_name GR(//ω//)OUP BY column_nam???e;

子查詢(xún)S??ELECT column_name FROM subquery AS source WHERE condition;

連接查詢(xún)SELECT column_name1, colum(′_｀)n_name2 FROM table1 JOIN table2 ON condition;

內聯(lián)子查詢(xún)SELECT column_name FROM ta(′_｀)ble1?? WHERE coヽ(′▽?zhuān)?ノndi??tion AN(′?_?`)D SELECT column_name FROM table2 WHERE condit(′▽?zhuān)?ion;

多表連接查詢(xún)SELECT column??_name1,(?⊿?) column_name2 FROM table1 JOIN table2 ON condition AND SELECT col(/ω＼)umn_name3 FROM table3 JOIN table4 ON condition;

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UNION ALL查詢(xún)SELECT column_name1,數據 column_name2 FROM table1 UNION SELECT colum(′▽?zhuān)?)n_name3, colヽ(′▽?zhuān)?ノumn_name4 FROM table2;

UNION查詢(xún)SELECT column_name1, column_name2 FROM table1 UNION SELECT column_name3, column_name4 FROM tabl??e2 UNION SELECT column_name5, column_nam??e6 FROM table3;

S??ELECT column_name1, column_name2 FROM table1 MINUS SELECT column_name3, column_name4 FROM table2;

MAXIMUM查詢(xún)SELECT column_name1, column_name2 FROM table1 MAXIMUM SELECT column_name3, co??lumn_name4 FR??OM table2;

AVG查詢(xún)SELECT AVG(column_value) FRO??M table1;

COUNT查詢(xún)SELECT COUNT??(*) FROM table1;

SELECT COUNT??(*) FROM table??1 WHERE condition;

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SELECT COUNT(*) FROM table1 WHERE condition AND SELECT COUNT(*) FROM table2 WHERE condition;

COUNT(*)查詢(xún)SELECT COUNT(*) FROM?? table1 WHERE condition AND SELECT COUNT(*) FROM table2 WHERE condition AND SELECT COUNT(*) FROM table3 WHERE condition;

COUNT(*)查詢(xún)SELE??CT COU??NT(*) FROM table1 WHERE condition AND SELECT COUNT(*) FROM table2 WHERE condition AND SELECT COUNT(*) FROM table3 WH(′?_?`)ERE condition AND SELECT COUNT(*) FROM table4 WHERE condition;

SELECT COUNT(*) FROM table1 WHERE condition AN(′ω｀)D SELEC??T COUNT(*) FROM table2 WHERE condition AND SELECT COUNT(*) FROM table3 WHERE condition AND SELECT COUNT(*) FROM table4 WHERE conditi??on AND SELECT COUNT??(*) FROM table5 WHERE condition;

COUNT(*)查詢(xún)SELECT CO??UNT(*) FROM table1 WHERE condition AND SELE(′ω｀)CT COUNT(*) FROM table2 WHERE condition AND SELECT COUNT(*) FROM table3 WHERE condition AND SELECT COUNT(*) FROM table4 WHERE condition AND SELECT COU??NT(*) FROM table(╯°□°)╯5ヽ(′ー｀)ノ WHERE conditi(′?｀*)on AND SELECT COUNT(*) FROM table6 WHERE conditi??on;

COUNT(*)查詢(xún)SELECT COUNT(*) FROM table1 WHERE conditio(′ω｀*)n AND SELECT COUNT(*) FROM table2 WHERE condition AND SELECT COUNT((??ヮ?)?*:???*) FROM table3 WHERE condition AND SELECT COUNT(*) FROM table4 WHERE condition AND SELECT COUN(′?｀*)T(*) FROM table5 WHERE condition AND SELECT COUNT(*?) FROM table6 WHERE condition AND SELECT COUNT(*) FROM table7 WHERE condition;

COUNT(*)ヽ(′?｀)ノ查詢(xún)SELECT COUNT(*) FROM table1 WHERE condition AND SELECT COU??NT(*) FROM table2 WHERE condition AND SELECT COUNT(*) FROM table3 WHERE co(°o°)ndition AN??D SELECT COUNT(*) FROM table4 WHERE condition AND SELECT COUNT??(*) FROM table5 WHERE condition AND SELECT COUNT(*) FROM table6 WHERE condition AND SELECT COUNT(*) FROM table7 WHERE condi??tion AND SELECT COUNT(*) FROM table8 WHERE condition;

COUNT(*)查詢(xún)SELECT COUNT(*) FROM tabl??e1 WHERE condition AND SELECT COUNT(*) FROM table2 WHERE condition AND SELECT COUNT(*) FROM table3 WHERE condition AND SELEC??T COUNT(*) FROM table4 WHERE condition AND SELECT COUNT(*) FROM table5 WHERE condition AND SE??LECTCOUNT()FROMtab(′?｀)le6WHEREconditionANDSELECTCOUNT()FROMtable7WHEREconditionAND??SELECTCOUNT()FROMtable8WHEREcondition;

NULL值處理IFNULL(column_value,庫管 ”);

ISNULL函數ISNULL(column_value);

COALESCE函數COALESCE(column_value1, column_value2);

IF函數IF(condition, value1, val(°□°)ue2);