From fdaa3f7d191ef2c3797609d02905f8249edbf5af Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?=E5=BC=80=E6=BA=90=E6=B5=B7=E5=93=A5?= Date: Wed, 26 Jul 2023 17:15:01 +0800 Subject: [PATCH] docs: update readme --- readme_zh.md | 118 +++++++++++++++++++++++++-------------------------- 1 file changed, 59 insertions(+), 59 deletions(-) diff --git a/readme_zh.md b/readme_zh.md index dbd20ec9..6333ff7d 100644 --- a/readme_zh.md +++ b/readme_zh.md @@ -22,7 +22,7 @@ ## QQ 群 -群号： 532992631 +群号： 850176767 ![](./docs/assets/images/qq_group.png) @@ -132,7 +132,7 @@ Page accounts = mapper.paginate(5, 10, query); QueryWrapper query = new QueryWrapper(); query.select().from(ACCOUNT); -// SQL: +// SQL: // SELECT * FROM tb_account ``` 也可以通过静态方法简写成如下两种形式，效果完全相同： @@ -143,7 +143,7 @@ QueryWrapper query = QueryWrapper.create() // 方式2 QueryWrapper query = select().from(ACCOUNT); -// SQL: +// SQL: // SELECT * FROM tb_account ``` ### select columns @@ -154,8 +154,8 @@ QueryWrapper query = new QueryWrapper(); query.select(ACCOUNT.ID, ACCOUNT.USER_NAME) .from(ACCOUNT); -// SQL: -// SELECT id, user_name +// SQL: +// SELECT id, user_name // FROM tb_account ``` @@ -169,9 +169,9 @@ QueryWrapper query = new QueryWrapper() .from(ACCOUNT.as("a"), ARTICLE.as("b")) .where(ACCOUNT.ID.eq(ARTICLE.ACCOUNT_ID)); -// SQL: -// SELECT a.id, a.user_name, b.id AS articleId, b.title -// FROM tb_account AS a, tb_article AS b +// SQL: +// SELECT a.id, a.user_name, b.id AS articleId, b.title +// FROM tb_account AS a, tb_article AS b // WHERE a.id = b.account_id ``` @@ -186,10 +186,10 @@ QueryWrapper query = new QueryWrapper() avg(ACCOUNT.SEX).as("sex_avg") ).from(ACCOUNT); -// SQL: -// SELECT id, user_name, -// MAX(birthday), -// AVG(sex) AS sex_avg +// SQL: +// SELECT id, user_name, +// MAX(birthday), +// AVG(sex) AS sex_avg // FROM tb_account ``` @@ -203,10 +203,10 @@ QueryWrapper queryWrapper = QueryWrapper.create() .where(ACCOUNT.ID.ge(100)) .and(ACCOUNT.USER_NAME.like("michael")); -// SQL: -// SELECT * FROM tb_account -// WHERE id >= ? -// AND user_name LIKE ? +// SQL: +// SELECT * FROM tb_account +// WHERE id >= ? +// AND user_name LIKE ? ``` ### where 动态条件 1 @@ -218,9 +218,9 @@ QueryWrapper queryWrapper = QueryWrapper.create() .where(flag ? ACCOUNT.ID.ge(100) : noCondition()) .and(ACCOUNT.USER_NAME.like("michael")); -// SQL: -// SELECT * FROM tb_account -// WHERE user_name LIKE ? +// SQL: +// SELECT * FROM tb_account +// WHERE user_name LIKE ? ``` ### where 动态条件 2 @@ -232,9 +232,9 @@ QueryWrapper queryWrapper = QueryWrapper.create() .where(ACCOUNT.ID.ge(100).when(flag)) .and(ACCOUNT.USER_NAME.like("michael")); -// SQL: -// SELECT * FROM tb_account -// WHERE user_name LIKE ? +// SQL: +// SELECT * FROM tb_account +// WHERE user_name LIKE ? ``` ### where 自动忽略 null 值 当遇到条件值为 null 时，会自动忽略该条件，不会拼接到 SQL 中 @@ -247,9 +247,9 @@ QueryWrapper queryWrapper = QueryWrapper.create() .where(ACCOUNT.ID.ge(num)) .and(ACCOUNT.USER_NAME.like(userName)); -// SQL: -// SELECT * FROM tb_account -// WHERE user_name LIKE '%michael%' +// SQL: +// SELECT * FROM tb_account +// WHERE user_name LIKE '%michael%' ``` @@ -262,9 +262,9 @@ QueryWrapper queryWrapper = QueryWrapper.create() select(ARTICLE.ACCOUNT_ID).from(ARTICLE).where(ARTICLE.ID.ge(100)) )); -// SQL: +// SQL: // SELECT * FROM tb_account -// WHERE id >= +// WHERE id >= // (SELECT account_id FROM tb_article WHERE id >= ? ) ``` @@ -281,11 +281,11 @@ QueryWrapper queryWrapper=QueryWrapper.create() ) ); -// SQL: -// SELECT * FROM tb_account -// WHERE id >= ? +// SQL: +// SELECT * FROM tb_account +// WHERE id >= ? // AND EXIST ( -// SELECT 1 FROM tb_article WHERE id >= ? +// SELECT 1 FROM tb_article WHERE id >= ? // ) ``` @@ -299,10 +299,10 @@ QueryWrapper queryWrapper = QueryWrapper.create() .and(ACCOUNT.SEX.eq(1).or(ACCOUNT.SEX.eq(2))) .or(ACCOUNT.AGE.in(18,19,20).and(ACCOUNT.USER_NAME.like("michael"))); -// SQL: -// SELECT * FROM tb_account -// WHERE id >= ? -// AND (sex = ? OR sex = ? ) +// SQL: +// SELECT * FROM tb_account +// WHERE id >= ? +// AND (sex = ? OR sex = ? ) // OR (age IN (?,?,?) AND user_name LIKE ? ) ``` @@ -314,8 +314,8 @@ QueryWrapper queryWrapper = QueryWrapper.create() .from(ACCOUNT) .groupBy(ACCOUNT.USER_NAME); -// SQL: -// SELECT * FROM tb_account +// SQL: +// SELECT * FROM tb_account // GROUP BY user_name ``` @@ -328,9 +328,9 @@ QueryWrapper queryWrapper = QueryWrapper.create() .groupBy(ACCOUNT.USER_NAME) .having(ACCOUNT.AGE.between(18,25)); -// SQL: -// SELECT * FROM tb_account -// GROUP BY user_name +// SQL: +// SELECT * FROM tb_account +// GROUP BY user_name // HAVING age BETWEEN ? AND ? ``` @@ -343,7 +343,7 @@ QueryWrapper queryWrapper = QueryWrapper.create() .orderBy(ACCOUNT.AGE.asc() , ACCOUNT.USER_NAME.desc().nullsLast()); -// SQL: +// SQL: // SELECT * FROM tb_account // ORDER BY age ASC, user_name DESC NULLS LAST ``` @@ -358,10 +358,10 @@ QueryWrapper queryWrapper = QueryWrapper.create() .innerJoin(ARTICLE).on(ACCOUNT.ID.eq(ARTICLE.ACCOUNT_ID)) .where(ACCOUNT.AGE.ge(10)); -// SQL: -// SELECT * FROM tb_account -// LEFT JOIN tb_article ON tb_account.id = tb_article.account_id -// INNER JOIN tb_article ON tb_account.id = tb_article.account_id +// SQL: +// SELECT * FROM tb_account +// LEFT JOIN tb_article ON tb_account.id = tb_article.account_id +// INNER JOIN tb_article ON tb_account.id = tb_article.account_id // WHERE tb_account.age >= ? ``` @@ -376,30 +376,30 @@ QueryWrapper queryWrapper = QueryWrapper.create() .limit(10) .offset(20); -// MySql: +// MySql: // SELECT * FROM `tb_account` ORDER BY `id` DESC LIMIT 20, 10 -// PostgreSQL: +// PostgreSQL: // SELECT * FROM "tb_account" ORDER BY "id" DESC LIMIT 20 OFFSET 10 -// Informix: +// Informix: // SELECT SKIP 20 FIRST 10 * FROM "tb_account" ORDER BY "id" DESC -// Oracle: -// SELECT * FROM (SELECT TEMP_DATAS.*, +// Oracle: +// SELECT * FROM (SELECT TEMP_DATAS.*, // ROWNUM RN FROM ( -// SELECT * FROM "tb_account" ORDER BY "id" DESC) -// TEMP_DATAS WHERE ROWNUM <=30) +// SELECT * FROM "tb_account" ORDER BY "id" DESC) +// TEMP_DATAS WHERE ROWNUM <=30) // WHERE RN >20 -// Db2: -// SELECT * FROM "tb_account" ORDER BY "id" DESC +// Db2: +// SELECT * FROM "tb_account" ORDER BY "id" DESC // OFFSET 20 ROWS FETCH NEXT 10 ROWS ONLY -// Sybase: +// Sybase: // SELECT TOP 10 START AT 21 * FROM "tb_account" ORDER BY "id" DESC -// Firebird: +// Firebird: // SELECT * FROM "tb_account" ORDER BY "id" DESC ROWS 20 TO 30 ``` @@ -489,7 +489,7 @@ accountMapper.update(account); ```sql update tb_account -set user_name = ?, sex = ? where id = ? +set user_name = ?, sex = ? where id = ? #params: null,1,100 ``` @@ -511,7 +511,7 @@ public class Account { private Map options; //getter setter - + public void addOption(String key, Object value) { if (options == null) { options = new HashMap<>(); @@ -612,7 +612,7 @@ public class Account { ## 还有问题？ -加入 QQ 交流群： 532992631 +加入 QQ 交流群： 850176767 ![](./docs/assets/images/qq_group.png)